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Document And Entity Information - shares	3 Months Ended
Document And Entity Information - shares	May 05, 2018	May 29, 2018
Document and Entity Information [Text Block] [Abstract]
Entity Registrant Name	Dollar Tree Inc
Entity Central Index Key	0000935703
Current Fiscal Year End Date	--02-02
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		237,775,572
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Document Type	10-Q
Amendment Flag	false
Document Period End Date	May 05, 2018

CONDENSED CONSOLIDATED INCOME STATEMENTS - USD ($) $ in Millions	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Income Statement [Abstract]
Net sales	$ 5,553.7	$ 5,287.1
Cost of sales	3,854.1	3,660.0
Gross profit	1,699.6	1,627.1
Selling, general and administrative expenses, excluding Receivable impairment	1,262.0	1,187.4
Receivable impairment	0.0	50.9
Selling, general and administrative expenses, excluding Receivable impairment	1,262.0	1,238.3
Operating income	437.6	388.8
Interest expense, net	230.0	74.7
Other expense, net	0.2	0.3
Income before income taxes	207.4	313.8
Income tax expense	46.9	113.3
Net income	$ 160.5	$ 200.5
Basic net income per share (usd per share)	$ 0.68	$ 0.85
Diluted net income per share (usd per share)	$ 0.67	$ 0.85

CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 160.5	$ 200.5
Foreign currency translation adjustments	(3.9)	(3.0)
Total comprehensive income	$ 156.6	$ 197.5

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) shares in Millions, $ in Millions	May 05, 2018	Feb. 03, 2018	Apr. 29, 2017
Current assets:
Cash and cash equivalents	$ 475.2	$ 1,097.8	$ 1,154.9
Short-term investments	0.0	0.0	4.0
Merchandise inventories, net	3,248.2	3,169.3	2,878.4
Other current assets	318.6	309.2	240.8
Total current assets	4,042.0	4,576.3	4,278.1
Property, plant and equipment, net of accumulated depreciation of $3,322.3, $3,192.1 and $2,814.5, respectively	3,249.7	3,200.7	3,093.9
Assets available for sale	8.0	8.0	10.6
Goodwill	5,024.2	5,025.2	5,022.4
Favorable lease rights, net of accumulated amortization of $251.0, $230.9 and $180.8, respectively	354.9	375.3	443.4
Tradename intangible asset	3,100.0	3,100.0	3,100.0
Other intangible assets, net	4.7	4.8	5.0
Other assets	43.6	42.5	41.3
Total assets	15,827.1	16,332.8	15,994.7
Current liabilities:
Current portion of long-term debt	0.0	915.9	165.9
Accounts payable	1,181.5	1,174.8	1,223.9
Income taxes payable	81.7	31.5	221.3
Other current liabilities	654.0	736.9	629.5
Total current liabilities	1,917.2	2,859.1	2,240.6
Long-term debt, net, excluding current portion	5,040.1	4,762.1	6,131.7
Unfavorable lease rights, net of accumulated amortization of $66.5, $61.1 and $45.3, respectively	94.5	100.0	117.6
Deferred tax liabilities, net	976.2	985.2	1,433.6
Income taxes payable, long-term	42.5	43.8	71.8
Other liabilities	400.9	400.3	390.4
Total liabilities	8,471.4	9,150.5	10,385.7
Shareholders’ equity	7,355.7	7,182.3	5,609.0
Total liabilities and shareholders’ equity	$ 15,827.1	$ 16,332.8	$ 15,994.7
Common shares outstanding	237.8	237.3	236.7

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	May 05, 2018	Feb. 03, 2018	Apr. 29, 2017
Statement of Financial Position [Abstract]
Accumulated Depreciation	$ 3,322.3	$ 3,192.1	$ 2,814.5
Accumulated Amortization, Favorable Lease Rights	251.0	230.9	180.8
Accumulated Amortization, Unfavorable Lease Rights	$ 66.5	$ 61.1	$ 45.3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Cash flows from operating activities:
Net income	$ 160.5	$ 200.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	151.5	153.9
Provision for deferred taxes	(9.0)	(23.0)
Amortization of debt discount and debt-issuance costs	49.7	3.6
Receivable impairment	0.0	50.9
Other non-cash adjustments to net income	33.6	32.9
Loss on debt extinguishment	(114.7)	0.0
Changes in operating assets and liabilities	(113.4)	11.9
Net cash provided by operating activities	387.6	430.7
Cash flows from investing activities:
Capital expenditures	(180.9)	(110.3)
Proceeds from (payments for) fixed asset disposition	(0.2)	2.2
Net cash used in investing activities	(181.1)	(108.1)
Cash flows from financing activities:
Principal payments for long-term debt	(5,432.7)	(27.8)
Proceeds from long-term debt, net of discount	4,775.8	0.0
Debt-issuance and debt extinguishment costs	(155.3)	0.0
Repayments of revolving credit facility	(50.0)	0.0
Proceeds from revolving credit facility	50.0	0.0
Proceeds from stock issued pursuant to stock-based compensation plans	4.6	11.8
Cash paid for taxes on exercises/vesting of stock-based compensation	(21.2)	(17.6)
Net cash used in financing activities	(828.8)	(33.6)
Effect of exchange rate changes on cash and cash equivalents	(0.3)	(0.5)
Net increase (decrease) in cash and cash equivalents	(622.6)	288.5
Cash and cash equivalents at beginning of period	1,097.8	866.4
Cash and cash equivalents at end of period	475.2	1,154.9
Cash paid for:
Interest, net of amounts capitalized	259.9	121.0
Income taxes	6.6	7.3
Non-cash transactions:
Accrued capital expenditures	$ 53.5	$ 43.2

BASIS OF PRESENTATION	3 Months Ended
BASIS OF PRESENTATION	May 05, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION The accompanying unaudited condensed consolidated financial statements of Dollar Tree, Inc. and its wholly-owned subsidiaries (the “Company”) have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information and are presented in accordance with the requirements of Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete consolidated financial statements. The unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto and Management’s Discussion and Analysis of Financial Condition and Results of Operations contained in the Company’s Annual Report on Form 10-K for the year ended February 3, 2018. The results of operations for the 13 weeks ended May 5, 2018 are not necessarily indicative of the results to be expected for the entire fiscal year ending February 2, 2019. In the Company’s opinion, the unaudited condensed consolidated financial statements included herein contain all adjustments (including those of a normal recurring nature) considered necessary for a fair presentation of its financial position as of May 5, 2018 and April 29, 2017 and the results of its operations and cash flows for the periods presented. The February 3, 2018 balance sheet information was derived from the audited consolidated financial statements as of that date. In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers.” This update replaced existing revenue recognition guidance in GAAP and requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The Company adopted the standard in the first quarter of fiscal 2018 and the adoption of the standard did not have an impact on the Company’s condensed consolidated financial statements or its internal control over financial reporting. In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments,” which provides guidance on eight specific cash flow issues in an effort to reduce diversity in practice in how certain cash receipts and cash payments are presented and classified within the statement of cash flows. This standard is effective retrospectively for fiscal years and interim periods within those years beginning after December 15, 2017. The Company adopted the standard in the first quarter of fiscal 2018, resulting in the classification of $124.5 million of cash paid for debt extinguishment as a financing activity in the accompanying unaudited condensed consolidated statement of cash flows for the 13 weeks ended May 5, 2018. In February 2016, the FASB issued ASU No. 2016-02, “Leases,” which will replace existing lease accounting guidance. The new standard will require lessees to recognize right-of-use assets and corresponding lease liabilities on the balance sheet for all in-scope leases with a term of greater than 12 months and disclose certain quantitative and qualitative information about leasing arrangements. When implemented, lessees will be required to recognize and measure leases using a modified retrospective approach, with optional practical expedients. The update is effective for interim and annual reporting periods beginning after December 15, 2018. The Company will adopt the standard in the first quarter of fiscal 2019. The Company has engaged a third party to assist in its preparation for implementation and its evaluation of the impact of the new pronouncement on its consolidated financial statements. The Company continues to assess the effect the implementation will have on its existing accounting policies and the consolidated financial statements and expects the adoption of this pronouncement to result in a material increase in the assets and liabilities on its consolidated balance sheets, with an immaterial impact on its consolidated income statements and consolidated statements of cash flows. Additionally, the Company is implementing lease accounting software to assist in the quantification of the expected impact on the consolidated balance sheets and to facilitate the calculations of the related accounting entries and disclosures. The Company is also evaluating additional changes to its processes and internal controls to ensure it is compliant with the reporting and disclosure requirements of the standard. As of February 3, 2018, the Company had $7.4 billion in undiscounted future minimum operating lease commitments.

LONG-TERM DEBT

3 Months Ended

May 05, 2018

Debt Disclosure [Abstract]

LONG-TERM DEBT

Long-term debt at May 5, 2018, February 3, 2018 and April 29, 2017 consists of the following:



	As of May 5, 2018					As of February 3, 2018					As of April 29, 2017
(in millions)	Principal		Unamortized Debt Discount, Premium and Issuance Costs			Principal		Unamortized Debt Discount, Premium and Issuance Costs			Principal		Unamortized Debt Discount, Premium and Issuance Costs
Forgivable Promissory Note	—		—			—		—			7.0		—
5.25% Acquisition Notes, due 2020	—		—			750.0		6.1			750.0		8.1
5.75% Acquisition Notes, due 2023	—		—			2,500.0		30.8			2,500.0		34.7
Term Loan A-1	—		—			1,532.7		3.4			2,157.2		5.7
Term Loan B-2	—		—			650.0		8.6			650.0		9.9
$1.25 billion Tranche A Revolving Credit Facility	—		—			—		12.6			—		16.5
5.00% Senior Notes, due 2021	300.0		(6.2		)	300.0		(6.8		)	300.0		(8.3		)
$1.25 billion Revolving Credit Facility, interest payable at LIBOR, reset periodically, plus 1.25%, which was 3.18% at May 5, 2018	—		11.8			—		—			—		—
Term Loan Facility, interest payable at LIBOR, reset periodically, plus 1.00%, which was 2.93% at May 5, 2018	782.0		2.5			—		—			—		—
Senior Floating Rate Notes, due 2020, interest payable at LIBOR, reset quarterly, plus 0.70%, which was 3.07% at May 5, 2018	750.0		5.1			—		—			—		—
3.70% Senior Notes, due 2023	1,000.0		8.8			—		—			—		—
4.00% Senior Notes, due 2025	1,000.0		7.9			—		—			—		—
4.20% Senior Notes, due 2028	1,250.0		12.0			—		—			—		—
Total	$	5,082.0	$	41.9		$	5,732.7	$	54.7		$	6,364.2	$	66.6

Senior Credit Facilities

On April 19, 2018, the Company entered into a credit agreement (the “Credit Agreement”) with JPMorgan Chase Bank, N.A., as administrative agent, providing for $2,032.0 million in senior credit facilities (the “Senior Credit Facilities”), consisting of a $1.25 billion revolving credit facility (the “Revolving Credit Facility”), of which up to $350.0 million is available for letters of credit, and a $782.0 million term loan facility (the “Term Loan Facility”).

The Company borrowed the entire $782.0 million Term Loan Facility on April 19, 2018. The Revolving Credit Facility matures on April 19, 2023, subject to extensions permitted under the Credit Agreement. The Term Loan Facility matures on April 19, 2020.

The loans under the Revolving Credit Facility bear interest at an initial interest rate of LIBOR, reset periodically, plus 1.25% and the loans under the Term Loan Facility bear interest at an initial interest rate of LIBOR, reset periodically, plus 1.00%, subject to adjustment based on (i) the Company’s credit ratings and (ii) the Company’s leverage ratio. Based on these factors, interest on the loans under the Revolving Credit Facility may range from LIBOR plus 1.00% to 1.50% and interest on the loans under the Term Loan Facility may range from LIBOR plus 0.875% to 1.25%. The Company pays certain commitment fees in connection with the Revolving Credit Facility. The Senior Credit Facilities allow voluntary repayment of outstanding loans at any time without premium or penalty, other than customary breakage costs with respect to LIBOR loans. There is no required amortization under the Senior Credit Facilities.

The Senior Credit Facilities contain a number of affirmative and negative covenants that, among other things, and subject to certain significant baskets and exceptions, restrict the Company’s ability to incur subsidiary indebtedness, incur liens, sell all or substantially all of the Company’s (including the Company’s subsidiaries’) assets and consummate certain fundamental changes. The Senior Credit Facilities also contain a maximum rent-adjusted leverage ratio covenant and a minimum fixed charge coverage ratio covenant.The Credit Agreement provides for certain events of default which, if any of them occurs, would permit or require the loans under the Senior Credit Facilities to be declared due and payable and the commitments thereunder to be terminated.

Senior Notes

On April 19, 2018, the Company completed the registered offering of $750.0 million aggregate principal amount of Senior Floating Rate Notes due 2020 (the “Floating Rate Notes”), $1.0 billion aggregate principal amount of 3.70% Senior Notes due 2023 (the “2023 Notes”), $1.0 billion aggregate principal amount of 4.00% Senior Notes due 2025 (the “2025 Notes”) and $1.25 billion aggregate principal amount of 4.20% Senior Notes due 2028 (the “2028 Notes” and together with the 2023 Notes and the 2025 Notes, the “Fixed Rate Notes”; and the Fixed Rate Notes together with the Floating Rate Notes, the “Notes”).

The Notes were issued pursuant to an indenture, dated as of April 2, 2018, between the Company and U.S. Bank National Association, as trustee, as supplemented by the First Supplemental Indenture dated as of April 19, 2018 (the “First Supplemental Indenture”).

The Notes are unsecured, unsubordinated obligations of the Company and rank equal in right of payment to all of the Company’s existing and future debt and other obligations that are not, by their terms, expressly subordinated in right of payment to the Notes.

The 2023 Notes mature on May 15, 2023 and bear interest at the rate of 3.70% annually. The 2025 Notes mature on May 15, 2025 and bear interest at the rate of 4.00% annually. The 2028 Notes mature on May 15, 2028 and bear interest at the rate of 4.20% annually. The Company is required to pay interest on the Fixed Rate Notes semiannually, in arrears, on May 15 and November 15 of each year, beginning on November 15, 2018, to holders of record on the preceding May 1 and November 1, respectively. The Floating Rate Notes mature on April 17, 2020 and bear interest at a floating rate, reset quarterly, equal to LIBOR plus 70 basis points. The Company is required to pay interest on the Floating Rate Notes quarterly, in arrears, on January 17, April 17, July 17 and October 17 of each year, beginning on July 17, 2018, to holders of record on the preceding January 3, April 3, July 3 and October 3, respectively.

The Company may redeem the Floating Rate Notes in whole or in part at any time beginning on April 22, 2019 at a price equal to 100% of the principal amount of Floating Rate Notes being redeemed plus accrued but unpaid interest to, but excluding, the redemption date. The Company may redeem the Fixed Rate Notes of each series in whole or in part, at its option, at any time and from time to time prior to (i) in the case of the 2023 Notes, April 15, 2023, (ii) in the case of the 2025 Notes, March 15, 2025 and (iii) in the case of the 2028 Notes, February 15, 2028 (each such date with respect to the applicable series, the “Applicable Par Call Date”), in each case, at a “make-whole” price described in the First Supplemental Indenture plus accrued and unpaid interest to, but excluding, the date of redemption. In addition, on or after the Applicable Par Call Date, the Company may redeem the Fixed Rate Notes of the applicable series, at any time in whole or from time to time in part, at a redemption price equal to 100% of the principal amount thereof.

In the event of a Change of Control Triggering Event, as defined in the indenture, with respect to any series, the holders of the Notes of such series may require the Company to purchase for cash all or a portion of their Notes of such series at a purchase price equal to 101% of the principal amount of such Notes, plus accrued and unpaid interest, if any, to, but excluding, the date of repurchase. The indenture limits the ability of the Company and its subsidiaries, subject to significant baskets and exceptions, to incur certain secured debt. The First Supplemental Indenture also provides for events of default which, if any of them occurs, would permit or require the principal of and accrued interest on the Notes to become or to be declared due and payable, as applicable.

Repayments of Long-term debt in the 13 weeks ended May 5, 2018

The Company redeemed its $750.0 million aggregate principal amount of 5.25% Acquisition Notes due 2020 (the “2020 Notes”) and accelerated the amortization of debt-issuance costs associated with the 2020 Notes of $6.1 million.

In connection with entry into the Credit Agreement and the offering of the Notes discussed above, the Company used the proceeds of borrowings under the Senior Credit Facilities, together with the net proceeds from the offering of the Notes and cash on hand to repay all of the outstanding loans under its existing senior secured credit facilities, including its Term Loan A-1 and Term Loan B-2, and redeem all of its outstanding 5.75% Acquisition Notes due 2023.

The credit agreement governing the existing senior secured credit facilities, dated as of March 9, 2015 (as amended, restated, supplemented or otherwise modified from time to time, the “Existing Credit Agreement”) was terminated and all of the guarantees of the obligations under the Existing Credit Agreement were terminated and all liens granted under the Existing Credit Agreement, including those equally and ratably securing the $300.0 million 5.00% Senior Notes due 2021 issued by the Company’s subsidiary, Family Dollar Stores, Inc., were released. Upon the termination of the Existing Credit Agreement, the Company paid certain lenders thereunder a prepayment premium of $6.5 million, which was equal to 1.00% of the outstanding principal amount of the Term Loan B-2 loans under the Existing Credit Agreement and is included in “Interest expense, net” on the accompanying unaudited condensed consolidated income statements.

The Company redeemed all of its outstanding $2.5 billion aggregate principal amount of 5.75% Acquisition Notes due 2023 and the indenture governing the notes was satisfied and discharged. The Company paid a redemption premium of $107.8 million, which was equal to 4.313% of the outstanding principal amount of the Acquisition Notes due 2023 and is included in “Interest expense, net” on the accompanying unaudited condensed consolidated income statements.

Related to the redemption of the 5.75% Acquisition Notes due 2023 and the repayment of the Company’s Existing Credit Agreement, the Company accelerated the expensing of approximately $41.2 million of amortizable non-cash deferred financing costs and expensed approximately $0.4 million in transaction-related costs. Additionally, the Company capitalized approximately $36.9 million of deferred financing costs and recorded an original issue discount in connection with entry into the Credit Agreement and the offering of the Notes, which will result in non-cash amortization over the term of the Senior Credit Facilities and Notes.

Debt Covenants

As of May 5, 2018, the Company was in compliance with its debt covenants.

INCOME TAXES	3 Months Ended
INCOME TAXES	May 05, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The Company’s effective tax rate was 22.6% for the 13 weeks ended May 5, 2018 compared with 36.1% for the 13 weeks ended April 29, 2017. The 2017 Tax Cuts and Jobs Act (“TCJA”) reduced the federal corporate tax rate from 35% to 21% for tax years beginning after December 31, 2017. As a result, the 2018 federal statutory tax rate is 21%. In the fourth quarter of 2017, the Company recorded a tax benefit based on currently available information and interpretations related to the TCJA, which are continuing to evolve, and as a result, the benefit is considered provisional. The Company will continue its analysis related to the TCJA as supplemental legislation, regulatory guidance, or evolving technical interpretations become available and will continue to refine such provisional amounts within the measurement period as provided by Staff Accounting Bulletin 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act. The Company expects to complete its analysis no later than December 2018.

LEGAL PROCEEDINGS	3 Months Ended
LEGAL PROCEEDINGS	May 05, 2018
Commitments and Contingencies Disclosure [Abstract]
LEGAL PROCEEDINGS	LEGAL PROCEEDINGS The Company is a defendant in legal proceedings including those described below and will vigorously defend itself in these matters. The Company does not believe that any of these matters will, individually or in the aggregate, have a material effect on its business or financial condition. The Company cannot give assurance, however, that one or more of these matters will not have a material effect on its results of operations for the quarter or year in which they are resolved. The Company assesses its legal proceedings and reserves are established if a loss is probable and the amount of such loss can be reasonably estimated. Many if not substantially all of the contingencies described below are subject to significant uncertainties and, therefore, determining the likelihood of a loss and the measurement of any loss can be complex and subject to judgment. With respect to legal proceedings where the Company has determined that a loss is reasonably possible but not probable, the Company is unable to estimate the amount or range of the reasonably possible loss due to the inherent difficulty of predicting the outcome of and uncertainties regarding legal proceedings. The Company’s assessments are based on estimates and assumptions that have been deemed reasonable by management, but that may prove to be incomplete or inaccurate, and unanticipated events and circumstances may occur that might cause the Company to change those estimates and assumptions. Management’s assessment of legal proceedings could change because of future determinations or the discovery of facts which are not presently known. Accordingly, the ultimate costs of resolving these proceedings may be substantially higher or lower than currently estimated. Dollar Tree Active Matters In April 2015, a distribution center employee filed a class action in California state court with allegations concerning wages, meal and rest breaks, recovery periods, wage statements and timely termination pay. The employee filed an amended complaint in which he abandoned his attempt to certify a nation-wide class of non-exempt distribution center employees for alleged improper calculation of overtime compensation. The Company removed this lawsuit to federal court. The court certified the case as a state-wide class action. In April 2015, a former store manager filed a class action in California federal court alleging, among other things, that the Company failed to make wage statements readily available to employees who did not receive paper checks. On November 7, 2017, the jury found in favor of the Company. The plaintiff has filed an appeal from the verdict. In April 2016, the Company was served with a putative class action in Florida state court brought by a former store employee asserting the Company violated the Fair Credit Reporting Act in the way it handled background checks. The plaintiff is seeking statutory damages of $100 to $1,000 per violation for the disclosure form claims. In July 2017, two former employees filed suit in federal court in California, seeking to represent a class of current and former non-exempt employees alleging that the Company’s dress code required them to purchase such distinctive clothing that it constituted a uniform and the Company’s failure to reimburse them for the clothing violated California law. The former employees seek restitution, damages, penalties and injunctive relief. We believe that this matter will be settled but an agreement has not been finalized. The expected settlement amount is not material. In August 2017, 43 current and former employees filed suit against the Company in state court in California alleging improper classification as exempt employees which they allege resulted in, among other things, their failure to receive overtime compensation, rest and meal periods, accurate wage statements, and final pay upon termination of employment. The Company has removed the case to federal court. The court ordered that each plaintiff refile his/her case individually so that the cases will be tried individually and not as a class. In August 2017, a former employee brought suit in California state court on a Private Attorney General Act ("PAGA") representative basis alleging the Company failed to provide him and all other California store associates with suitable seating when they were performing cashier functions. Several lawsuits were filed recently against Dollar Tree, Family Dollar and their vendors alleging that personal powder products caused cancer. The Company does not believe the products it sold caused the illnesses. The Company believes these lawsuits are insured and it is seeking indemnification from third parties. Dollar Tree Resolved Matters In November 2017, a current employee filed a PAGA representative action in California state court alleging the Company failed to make wage statements readily available to California store employees who do not receive paper checks. The lawsuit has been dismissed with prejudice. In February 2018, a current store manager filed a statewide class action in Missouri state court alleging the Company’s store managers are improperly classified as exempt employees thereby entitling them to overtime pay, liquidated damages and damages for unjust enrichment. The case was dismissed with prejudice. Family Dollar Active Matters In January 2017, a customer filed a class action in federal court in Illinois alleging the Company violated various state consumer fraud laws as well as express and implied warranties by selling a product that purported to contain aloe when it did not. The requested class is limited to the state of Illinois. The Company believes that it is fully indemnified by the entities that supplied it with the product. On May 8, 2018, the Court granted the Company’s motion to dismiss the complaint in its entirety, but it is allowing the customer until June 5, 2018, to file an amended complaint. In April 2017, a former store employee filed a lawsuit in California state court alleging off the clock work primarily for bag checks, failure to pay overtime, failure to provide rest and meal breaks, failure to pay wages timely during and upon termination of employment and failure to provide accurate wage statements. The court granted the Company’s motion to compel arbitration and stayed the case pending the outcome of the arbitration proceedings. Subsequently, the court allowed plaintiff to amend her complaint to include PAGA claims, on behalf of herself and others, which are not subject to arbitration. However, those claims remain stayed pending the outcome of the arbitration proceeding. In June 2017, a former store employee filed suit in California state court asserting PAGA claims on behalf of herself and other allegedly aggrieved employees alleging the Company willfully caused their work time to go under reported so they failed to receive pay for time worked, rest and meal breaks, minimum wage and overtime compensation, final pay in a timely manner, and accurate wage statements. In December 2017, a former assistant store manager filed suit in California state court asserting PAGA claims on behalf of herself and other store managers and assistant store managers seeking wages for alleged off the clock work and alleged overtime, premium pay for alleged missed rest and meal breaks, penalties for alleged failure to provide accurate wage statements, alleged failure to maintain payroll records, and alleged failure to pay wages timely during and upon termination of employment. In January 2018, a former store manager and a former assistant store manager filed suit in California state court asserting class claims on behalf of themselves and their respective classes seeking to recover alleged unpaid overtime and unpaid regular wages for time spent allegedly working off the clock, premium pay for allegedly receiving noncompliant rest and meal periods, penalties for allegedly receiving inaccurate wage statements and waiting time penalties for allegedly failing to pay all wages due upon termination of employment.

FAIR VALUE MEASUREMENTS

3 Months Ended

May 05, 2018

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

As required, financial assets and liabilities are classified in the fair value hierarchy in their entirety based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels.

The carrying amounts of Cash and cash equivalents and Accounts payable as reported in the Company’s unaudited condensed consolidated balance sheets approximate fair value due to their short-term maturities.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table sets forth the Company’s financial assets and liabilities that are measured at fair value on a recurring basis:



(in millions)	May 5, 2018		February 3, 2018		April 29, 2017
Level 1
Short-term investments	$	—	$	—	$	4.0
Deferred compensation plan assets	21.7		20.7		19.8

Deferred compensation plan assets are held pursuant to deferred compensation plans for certain officers and executives. The deferred compensation plan assets are recorded in "Other assets" on the accompanying unaudited condensed consolidated balance sheets and a corresponding liability is recorded in "Other liabilities" on the accompanying unaudited condensed consolidated balance sheets.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Certain assets and liabilities are measured at fair value on a nonrecurring basis; that is, the assets and liabilities are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (e.g., when there is evidence of impairment). The Company did not record any significant impairment charges during the 13 weeks ended May 5, 2018.

The aggregate fair values and carrying values of the Company’s long-term borrowings were as follows:



	May 5, 2018				February 3, 2018				April 29, 2017
(in millions)	Fair Value		Carrying Value		Fair Value		Carrying Value		Fair Value		Carrying Value
Level 1
Senior Notes and Acquisition Notes	$	4,268.2	$	4,272.4	$	3,684.6	$	3,519.9	$	3,745.0	$	3,515.5
Level 2
Term loans	774.2		779.5		2,187.6		2,170.7		2,817.7		2,791.6

The fair values of the Company’s 5.00% Senior Notes due 2021 and the Notes (collectively, the “Senior Notes”), and the fair values of the 5.25% Acquisition Notes due 2020 and 5.75% Acquisition Notes due 2023 (together, “the Acquisition Notes”) that were redeemed during the 13 weeks ended May 5, 2018, were determined using Level 1 inputs as quoted prices in active markets for identical assets or liabilities are available. The fair value of the Company’s Term Loan Facility and the fair values of the Term Loan A-1 and Term Loan B-2, which the Company prepaid in full during the 13 weeks ended May 5, 2018, were determined using Level 2 inputs as quoted prices are readily available from pricing services, but the prices are not published. The carrying values of the Company’s Revolving Credit Facility at May 5, 2018 and the Company’s Tranche A Revolving Credit Facility at February 3, 2018 and April 29, 2017, approximated their fair values because the interest rates vary with market interest rates.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

NET INCOME PER SHARE

3 Months Ended

May 05, 2018

Earnings Per Share [Abstract]

NET INCOME PER SHARE

The following table sets forth the calculations of basic and diluted net income per share:



	13 Weeks Ended
	May 5,		April 29,
(in millions, except per share data)	2018		2017
Basic net income per share:
Net income	$	160.5	$	200.5
Weighted average number of shares outstanding	237.5		236.3
Basic net income per share	$	0.68	$	0.85
Diluted net income per share:
Net income	$	160.5	$	200.5
Weighted average number of shares outstanding	237.5		236.3
Dilutive effect of stock options and restricted stock (as determined by applying the treasury stock method)	1.0		1.0
Weighted average number of shares and dilutive potential shares outstanding	238.5		237.3
Diluted net income per share	$	0.67	$	0.85

For the 13 weeks ended May 5, 2018 and April 29, 2017, substantially all of the stock options outstanding were included in the calculation of the weighted average number of shares and dilutive potential shares outstanding.

STOCK-BASED COMPENSATION

3 Months Ended

May 05, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK-BASED COMPENSATION

For a discussion of the Company’s stock-based compensation plans, refer to Note 9 of the Company’s Annual Report on Form 10-K for the year ended February 3, 2018.

The Company’s stock-based compensation expense primarily includes the fair value of restricted stock units (RSUs) and employees’ purchase rights under the Company’s Employee Stock Purchase Plan. Stock-based compensation expense was $32.1 million and $27.6 million during the 13 weeks ended May 5, 2018 and April 29, 2017, respectively.

Restricted Stock

The Company issues serviced-based RSUs to employees and officers and issues performance-based RSUs to certain officers of the Company. The Company recognizes expense based on the estimated fair value of the RSUs granted over the requisite service period, which is generally three years, on a straight-line basis or a shorter period based on the retirement eligibility of the grantee. The fair value of RSUs is determined using the Company’s closing stock price on the date of grant.

The following table summarizes the status of RSU’s as of May 5, 2018 and changes during the 13 weeks then ended.



	Number of Shares		Weighted Average Grant Date Fair Value
Nonvested at February 3, 2018	1,525,252		$	79.37
Granted	780,700		91.91
Vested	(615,653	)	79.80
Forfeited	(14,022	)	80.52
Nonvested at May 5, 2018	1,676,277		$	86.50

SEGMENTS

3 Months Ended

May 05, 2018

Segment Reporting [Abstract]

SEGMENTS

The Company operates a chain of more than 14,900 retail discount stores in 48 states and five Canadian provinces. The Company’s operations are conducted in two reporting business segments: Dollar Tree and Family Dollar. The Company defines its segments as those operations whose results its chief operating decision maker (“CODM”) regularly reviews to analyze performance and allocate resources.

The Dollar Tree segment is the leading operator of discount variety stores offering merchandise at the fixed price of $1.00. The Dollar Tree segment includes the Company’s operations under the “Dollar Tree” and “Dollar Tree Canada” brands, 11 distribution centers in the United States, two distribution centers in Canada and a Store Support Center in Chesapeake, Virginia.

The Family Dollar segment operates a chain of general merchandise retail discount stores providing consumers with a selection of competitively-priced merchandise in convenient neighborhood stores. The Family Dollar segment consists of the Company’s operations under the “Family Dollar” brand, 11 distribution centers and a Store Support Center in Matthews, North Carolina.

The Company measures the results of its segments using, among other measures, each segment’s net sales, gross profit and operating income. The Company may revise the measurement of each segment’s operating income, including the allocation of distribution center and Store Support Center costs, as determined by the information regularly reviewed by the CODM. If the measurement of a segment changes, prior period amounts and balances would be reclassified to be comparable to the current period’s presentation.

Net sales by segment are as follows:



	13 Weeks Ended
	May 5,		April 29,
(in millions)	2018		2017
Net sales:
Dollar Tree	$	2,784.5	$	2,571.7
Family Dollar	2,769.2		2,715.4
Total net sales	$	5,553.7	$	5,287.1

Gross profit by segment is as follows:



	13 Weeks Ended
	May 5,		April 29,
(in millions)	2018		2017
Gross profit:
Dollar Tree	$	960.8	$	896.6
Family Dollar	738.8		730.5
Total gross profit	$	1,699.6	$	1,627.1

Depreciation and amortization expense by segment is as follows:



	13 Weeks Ended
	May 5,		April 29,
(in millions)	2018		2017
Depreciation and amortization expense:
Dollar Tree	$	64.0	$	61.5
Family Dollar	87.6		92.4
Total depreciation and amortization expense	$	151.6	$	153.9

Operating income by segment is as follows:



	13 Weeks Ended
	May 5,		April 29,
(in millions)	2018		2017
Operating income:
Dollar Tree	$	330.2	$	315.4
Family Dollar	107.4		73.4
Total operating income	$	437.6	$	388.8

Capital expenditures by segment are as follows:



	13 Weeks Ended
	May 5,		April 29,
(in millions)	2018		2017
Capital expenditures:
Dollar Tree	$	117.2	$	65.7
Family Dollar	63.7		44.6
Total capital expenditures	$	180.9	$	110.3

Total assets by segment are as follows:



	As of
	May 5,		February 3,		April 29,
(in millions)	2018		2018		2017
Total assets:
Dollar Tree	$	3,737.4	$	4,113.4	$	3,906.4
Family Dollar	12,089.7		12,219.4		12,088.3
Total assets	$	15,827.1	$	16,332.8	$	15,994.7

Total goodwill by segment is as follows:



	As of
	May 5,		February 3,		April 29,
(in millions)	2018		2018		2017
Total goodwill:
Dollar Tree	$	346.1	$	347.1	$	344.3
Family Dollar	4,678.1		4,678.1		4,678.1
Total goodwill	$	5,024.2	$	5,025.2	$	5,022.4

BASIS OF PRESENTATION (Policies)	3 Months Ended
BASIS OF PRESENTATION (Policies)	May 05, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
New Accounting Pronouncements	In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers.” This update replaced existing revenue recognition guidance in GAAP and requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The Company adopted the standard in the first quarter of fiscal 2018 and the adoption of the standard did not have an impact on the Company’s condensed consolidated financial statements or its internal control over financial reporting. In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments,” which provides guidance on eight specific cash flow issues in an effort to reduce diversity in practice in how certain cash receipts and cash payments are presented and classified within the statement of cash flows. This standard is effective retrospectively for fiscal years and interim periods within those years beginning after December 15, 2017. The Company adopted the standard in the first quarter of fiscal 2018, resulting in the classification of $124.5 million of cash paid for debt extinguishment as a financing activity in the accompanying unaudited condensed consolidated statement of cash flows for the 13 weeks ended May 5, 2018. In February 2016, the FASB issued ASU No. 2016-02, “Leases,” which will replace existing lease accounting guidance. The new standard will require lessees to recognize right-of-use assets and corresponding lease liabilities on the balance sheet for all in-scope leases with a term of greater than 12 months and disclose certain quantitative and qualitative information about leasing arrangements. When implemented, lessees will be required to recognize and measure leases using a modified retrospective approach, with optional practical expedients. The update is effective for interim and annual reporting periods beginning after December 15, 2018. The Company will adopt the standard in the first quarter of fiscal 2019. The Company has engaged a third party to assist in its preparation for implementation and its evaluation of the impact of the new pronouncement on its consolidated financial statements. The Company continues to assess the effect the implementation will have on its existing accounting policies and the consolidated financial statements and expects the adoption of this pronouncement to result in a material increase in the assets and liabilities on its consolidated balance sheets, with an immaterial impact on its consolidated income statements and consolidated statements of cash flows. Additionally, the Company is implementing lease accounting software to assist in the quantification of the expected impact on the consolidated balance sheets and to facilitate the calculations of the related accounting entries and disclosures. The Company is also evaluating additional changes to its processes and internal controls to ensure it is compliant with the reporting and disclosure requirements of the standard. As of February 3, 2018, the Company had $7.4 billion in undiscounted future minimum operating lease commitments.

LONG-TERM DEBT (Tables)

3 Months Ended

May 05, 2018

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

Long-term debt at May 5, 2018, February 3, 2018 and April 29, 2017 consists of the following:



	As of May 5, 2018					As of February 3, 2018					As of April 29, 2017
(in millions)	Principal		Unamortized Debt Discount, Premium and Issuance Costs			Principal		Unamortized Debt Discount, Premium and Issuance Costs			Principal		Unamortized Debt Discount, Premium and Issuance Costs
Forgivable Promissory Note	—		—			—		—			7.0		—
5.25% Acquisition Notes, due 2020	—		—			750.0		6.1			750.0		8.1
5.75% Acquisition Notes, due 2023	—		—			2,500.0		30.8			2,500.0		34.7
Term Loan A-1	—		—			1,532.7		3.4			2,157.2		5.7
Term Loan B-2	—		—			650.0		8.6			650.0		9.9
$1.25 billion Tranche A Revolving Credit Facility	—		—			—		12.6			—		16.5
5.00% Senior Notes, due 2021	300.0		(6.2		)	300.0		(6.8		)	300.0		(8.3		)
$1.25 billion Revolving Credit Facility, interest payable at LIBOR, reset periodically, plus 1.25%, which was 3.18% at May 5, 2018	—		11.8			—		—			—		—
Term Loan Facility, interest payable at LIBOR, reset periodically, plus 1.00%, which was 2.93% at May 5, 2018	782.0		2.5			—		—			—		—
Senior Floating Rate Notes, due 2020, interest payable at LIBOR, reset quarterly, plus 0.70%, which was 3.07% at May 5, 2018	750.0		5.1			—		—			—		—
3.70% Senior Notes, due 2023	1,000.0		8.8			—		—			—		—
4.00% Senior Notes, due 2025	1,000.0		7.9			—		—			—		—
4.20% Senior Notes, due 2028	1,250.0		12.0			—		—			—		—
Total	$	5,082.0	$	41.9		$	5,732.7	$	54.7		$	6,364.2	$	66.6

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644

+ Details

FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

May 05, 2018

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]

The following table sets forth the Company’s financial assets and liabilities that are measured at fair value on a recurring basis:



(in millions)	May 5, 2018		February 3, 2018		April 29, 2017
Level 1
Short-term investments	$	—	$	—	$	4.0
Deferred compensation plan assets	21.7		20.7		19.8

NET INCOME PER SHARE (Tables)

3 Months Ended

May 05, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table sets forth the calculations of basic and diluted net income per share:



	13 Weeks Ended
	May 5,		April 29,
(in millions, except per share data)	2018		2017
Basic net income per share:
Net income	$	160.5	$	200.5
Weighted average number of shares outstanding	237.5		236.3
Basic net income per share	$	0.68	$	0.85
Diluted net income per share:
Net income	$	160.5	$	200.5
Weighted average number of shares outstanding	237.5		236.3
Dilutive effect of stock options and restricted stock (as determined by applying the treasury stock method)	1.0		1.0
Weighted average number of shares and dilutive potential shares outstanding	238.5		237.3
Diluted net income per share	$	0.67	$	0.85

SEGMENTS (Tables)

3 Months Ended

May 05, 2018

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Net sales by segment are as follows:



	13 Weeks Ended
	May 5,		April 29,
(in millions)	2018		2017
Net sales:
Dollar Tree	$	2,784.5	$	2,571.7
Family Dollar	2,769.2		2,715.4
Total net sales	$	5,553.7	$	5,287.1

Gross profit by segment is as follows:



	13 Weeks Ended
	May 5,		April 29,
(in millions)	2018		2017
Gross profit:
Dollar Tree	$	960.8	$	896.6
Family Dollar	738.8		730.5
Total gross profit	$	1,699.6	$	1,627.1

Depreciation and amortization expense by segment is as follows:



	13 Weeks Ended
	May 5,		April 29,
(in millions)	2018		2017
Depreciation and amortization expense:
Dollar Tree	$	64.0	$	61.5
Family Dollar	87.6		92.4
Total depreciation and amortization expense	$	151.6	$	153.9

Operating income by segment is as follows:



	13 Weeks Ended
	May 5,		April 29,
(in millions)	2018		2017
Operating income:
Dollar Tree	$	330.2	$	315.4
Family Dollar	107.4		73.4
Total operating income	$	437.6	$	388.8

Capital expenditures by segment are as follows:



	13 Weeks Ended
	May 5,		April 29,
(in millions)	2018		2017
Capital expenditures:
Dollar Tree	$	117.2	$	65.7
Family Dollar	63.7		44.6
Total capital expenditures	$	180.9	$	110.3

Total assets by segment are as follows:



	As of
	May 5,		February 3,		April 29,
(in millions)	2018		2018		2017
Total assets:
Dollar Tree	$	3,737.4	$	4,113.4	$	3,906.4
Family Dollar	12,089.7		12,219.4		12,088.3
Total assets	$	15,827.1	$	16,332.8	$	15,994.7

Total goodwill by segment is as follows:



	As of
	May 5,		February 3,		April 29,
(in millions)	2018		2018		2017
Total goodwill:
Dollar Tree	$	346.1	$	347.1	$	344.3
Family Dollar	4,678.1		4,678.1		4,678.1
Total goodwill	$	5,024.2	$	5,025.2	$	5,022.4

BASIS OF PRESENTATION (Details) $ in Billions	Feb. 03, 2018 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Undiscounted future minimum operating lease commitments	$ 7.4

LONG-TERM DEBT - Summary of Long-Term Debt (Details) - USD ($)	3 Months Ended
	May 05, 2018	Apr. 19, 2018	Feb. 03, 2018	Apr. 29, 2017
Debt Instrument [Line Items]
Long-term debt	$ 5,082,000,000		$ 5,732,700,000	$ 6,364,200,000
Debt instrument, unamortized discount (premium) and debt issuance costs, net	41,900,000		54,700,000	66,600,000
3.70% Note, Due 2023
Debt Instrument [Line Items]
Stated percentage		3.70%
4.00% Note, Due 2025
Debt Instrument [Line Items]
Stated percentage		4.00%
4.20% Note, Due 2028
Debt Instrument [Line Items]
Stated percentage		4.20%
Forgivable Promissory Notes
Debt Instrument [Line Items]
Long-term debt	0		0	7,000,000
Debt instrument, unamortized discount (premium) and debt issuance costs, net	0		0	0
Acquisition Notes \| 5.25% Acquisition Notes, due 2020
Debt Instrument [Line Items]
Long-term debt	0		750,000,000	750,000,000
Debt instrument, unamortized discount (premium) and debt issuance costs, net	$ 0		6,100,000	8,100,000
Stated percentage	5.25%
Acquisition Notes \| 5.75% Acquisition Notes, due 2023
Debt Instrument [Line Items]
Long-term debt	$ 0		2,500,000,000	2,500,000,000
Debt instrument, unamortized discount (premium) and debt issuance costs, net	$ 0		30,800,000	34,700,000
Stated percentage	5.75%
Loans Payable \| Term Loan A-1
Debt Instrument [Line Items]
Long-term debt	$ 0		1,532,700,000	2,157,200,000
Debt instrument, unamortized discount (premium) and debt issuance costs, net	0		3,400,000	5,700,000
Loans Payable \| Term Loan B-2
Debt Instrument [Line Items]
Long-term debt	0		650,000,000	650,000,000
Debt instrument, unamortized discount (premium) and debt issuance costs, net	$ 0		8,600,000	9,900,000
Senior Notes \| 5.25% Acquisition Notes, due 2020
Debt Instrument [Line Items]
Stated percentage	5.25%
Senior Notes \| 5.75% Acquisition Notes, due 2023
Debt Instrument [Line Items]
Stated percentage	5.75%
Senior Notes \| 5.00% Note, Due 2021
Debt Instrument [Line Items]
Long-term debt	$ 300,000,000		300,000,000	300,000,000
Debt instrument, unamortized discount (premium) and debt issuance costs, net	$ (6,200,000)		(6,800,000)	(8,300,000)
Stated percentage	5.00%
Senior Notes \| 3.70% Note, Due 2023
Debt Instrument [Line Items]
Long-term debt	$ 1,000,000,000		0	0
Debt instrument, unamortized discount (premium) and debt issuance costs, net	$ 8,800,000		0	0
Stated percentage	3.70%
Senior Notes \| 4.00% Note, Due 2025
Debt Instrument [Line Items]
Long-term debt	$ 1,000,000,000		0	0
Debt instrument, unamortized discount (premium) and debt issuance costs, net	$ 7,900,000		0	0
Stated percentage	4.00%
Senior Notes \| 4.20% Note, Due 2028
Debt Instrument [Line Items]
Long-term debt	$ 1,250,000,000		0	0
Debt instrument, unamortized discount (premium) and debt issuance costs, net	$ 12,000,000		0	0
Stated percentage	4.20%
Term Loan Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 782,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,250,000,000.00	$ 1,250,000,000
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Long-term debt	0		0	0
Debt instrument, unamortized discount (premium) and debt issuance costs, net	11,800,000		0	0
Revolving Credit Facility \| Line of Credit \| Tranche A Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	0		0	0
Debt instrument, unamortized discount (premium) and debt issuance costs, net	0		12,600,000	16,500,000
Line of credit facility, maximum borrowing capacity	1,250,000,000.00
Revolving Credit Facility \| Term Loan Facility
Debt Instrument [Line Items]
Long-term debt	782,000,000		0	0
Debt instrument, unamortized discount (premium) and debt issuance costs, net	2,500,000		0	0
Revolving Credit Facility \| Senior Floating Note
Debt Instrument [Line Items]
Long-term debt	750,000,000		0	0
Debt instrument, unamortized discount (premium) and debt issuance costs, net	$ 5,100,000		$ 0	$ 0
London Interbank Offered Rate (LIBOR) \| Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Debt instrument, interest rate, effective percentage	2.93%
London Interbank Offered Rate (LIBOR) \| Senior Floating Note
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.70%
Debt instrument, interest rate, effective percentage	3.07%
London Interbank Offered Rate (LIBOR) \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.25%
London Interbank Offered Rate (LIBOR) \| Revolving Credit Facility \| Loans Payable
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.25%
Debt instrument, interest rate, effective percentage	3.28%

LONG-TERM DEBT (Details) - USD ($)	3 Months Ended
LONG-TERM DEBT (Details) - USD ($)	May 05, 2018	Apr. 19, 2018
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage of principal amount redeemed	101.00%
Accelerated amortizable non-cash deferred financing costs	$ 41,200,000
Amortization of debt transaction-related costs	400,000
Deferred financing costs	36,900,000
Senior Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 2,032,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	1,250,000,000.00	1,250,000,000
3.70% Note, Due 2023
Debt Instrument [Line Items]
Registered offering, amount		$ 1,000,000,000.0
Stated percentage		3.70%
4.00% Note, Due 2025
Debt Instrument [Line Items]
Registered offering, amount		$ 1,000,000,000.0
Stated percentage		4.00%
4.20% Note, Due 2028
Debt Instrument [Line Items]
Registered offering, amount		$ 1,250,000,000.00
Stated percentage		4.20%
Term Loan B-2
Debt Instrument [Line Items]
Debt, prepayment premium, amount	$ 6,500,000
Debt, prepayment premium, percent	1.00%
Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 350,000,000
Term Loan Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		782,000,000
Line of credit facility, utilized amount		782,000,000
Senior Floating Note
Debt Instrument [Line Items]
Registered offering, amount		$ 750,000,000.0
Debt instrument, redemption price, percentage of principal amount redeemed	100.00%
Fixed Rate Note
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage of principal amount redeemed	100.00%
Acquisition Notes \| 5.25% Acquisition Notes, due 2020
Debt Instrument [Line Items]
Stated percentage	5.25%
Repayments of debt	$ 750,000,000
Acceleration of amortization of debt issuance costs	6,100,000
Redemption premium	$ 107,800,000
Redemption premium, percentage	4.313%
Acquisition Notes \| 5.75% Acquisition Notes, due 2023
Debt Instrument [Line Items]
Stated percentage	5.75%
Debt instrument, face amount	$ 2,500,000,000.0
Senior Notes \| 3.70% Note, Due 2023
Debt Instrument [Line Items]
Stated percentage	3.70%
Senior Notes \| 4.00% Note, Due 2025
Debt Instrument [Line Items]
Stated percentage	4.00%
Senior Notes \| 4.20% Note, Due 2028
Debt Instrument [Line Items]
Stated percentage	4.20%
Senior Notes \| 5.25% Acquisition Notes, due 2020
Debt Instrument [Line Items]
Stated percentage	5.25%
Senior Notes \| 5.75% Acquisition Notes, due 2023
Debt Instrument [Line Items]
Stated percentage	5.75%
Senior Notes \| 5.00% Note, Due 2021
Debt Instrument [Line Items]
Stated percentage	5.00%
Debt instrument, face amount	$ 300,000,000.0
London Interbank Offered Rate (LIBOR) \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.25%
London Interbank Offered Rate (LIBOR) \| Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
London Interbank Offered Rate (LIBOR) \| Senior Floating Note
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.70%
Minimum \| London Interbank Offered Rate (LIBOR) \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Minimum \| London Interbank Offered Rate (LIBOR) \| Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.88%
Maximum \| London Interbank Offered Rate (LIBOR) \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.50%
Maximum \| London Interbank Offered Rate (LIBOR) \| Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.25%

INCOME TAXES (Details)	3 Months Ended
INCOME TAXES (Details)	May 05, 2018	Oct. 28, 2017	Oct. 29, 2016
Income Tax Disclosure [Abstract]
Effective tax rate		22.60%	36.10%
Federal statutory tax rate	21.00%

LEGAL PROCEEDINGS (Details)	1 Months Ended
LEGAL PROCEEDINGS (Details)	Aug. 31, 2017 Employee	Jul. 31, 2017 Employee	Apr. 30, 2016 USD ($)
Loss Contingencies [Line Items]
Loss contingency, number of plaintiffs \| Employee	43	2
Minimum \| Fair Credit Reporting Act Violations
Loss Contingencies [Line Items]
Damages sought, per violation			$ 100
Maximum \| Fair Credit Reporting Act Violations
Loss Contingencies [Line Items]
Damages sought, per violation			$ 1,000

FAIR VALUE MEASUREMENTS Fair Value Measurements (Details) - USD ($) $ in Millions	May 05, 2018	Feb. 03, 2018	Apr. 29, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 0.0	$ 0.0	$ 4.0
Long-term debt	5,082.0	5,732.7	6,364.2
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0.0	0.0	4.0
Deferred compensation plan assets	21.7	20.7	19.8
Secured Senior Notes and Acquisition Notes \| Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	4,268.2	3,684.6	3,745.0
Long-term debt	4,272.4	3,519.9	3,515.5
Long term debt - term loans \| Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	774.2	2,187.6	2,817.7
Long-term debt	779.5	2,170.7	2,791.6
5.00% Note, Due 2021 \| Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 300.0	$ 300.0	$ 300.0
Stated percentage	5.00%
5.25% Acquisition Notes, due 2020 \| Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated percentage	5.25%
5.75% Acquisition Notes, due 2023 \| Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated percentage	5.75%

NET INCOME PER SHARE Schedule of Earnings per share, basic and diluted (table details) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Earnings Per Share [Abstract]
Net income	$ 160.5	$ 200.5
Weighted Average Number of Shares Outstanding (shares)	237.5	236.3
Basic net income per share (usd per share)	$ 0.68	$ 0.85
Incremental Common Shares Attributable to Share-based Payment Arrangements	1.0	1.0
Weighted average number of shares and dilutive potential shares outstanding (shares)	238.5	237.3
Diluted net income per share (usd per share)	$ 0.67	$ 0.85

STOCK-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 32.1	$ 27.6
Compensation expense, period	3 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Number of shares, beginning (in shares)	1,525,252
Number of shares, granted (in shares)	780,700
Number of shares, vested (in shares)	(615,653)
Number of shares, forfeited (in shares)	(14,022)
Number of shares, end (in shares)	1,676,277
Number of shares, beginning (USD per share)	$ 79.37
Number of shares, granted (USD per share)	91.91
Number of shares, vested (USD per share)	79.80
Number of shares, forfeited (USD per share)	80.52
Number of shares, ending (USD per share)	$ 86.50

SEGMENTS (Details)	3 Months Ended		9 Months Ended
SEGMENTS (Details)	May 05, 2018 USD ($)	Apr. 29, 2017 USD ($)	Oct. 29, 2016 USD ($)	Feb. 03, 2018 USD ($)
Segment Reporting Information [Line Items]
Net sales	$ 5,553,700,000	$ 5,287,100,000
Gross profit	1,699,600,000	1,627,100,000
Depreciation and amortization expense	151,600,000	153,900,000
Operating income (loss)	437,600,000	388,800,000
Capital expenditures	180,900,000	110,300,000
Assets	15,827,100,000	15,994,700,000		$ 16,332,800,000
Goodwill	$ 5,024,200,000	5,022,400,000		5,025,200,000
Number of retail discount stores	14,900
Number of states stores operating in	48
Number Of Canadian provinces	5
Number of reportable segments	2
Dollar Tree
Segment Reporting Information [Line Items]
Net sales	$ 2,784,500,000	2,571,700,000
Gross profit	960,800,000	896,600,000
Depreciation and amortization expense	64,000,000	61,500,000
Operating income (loss)	330,200,000	315,400,000
Capital expenditures	117,200,000	65,700,000
Assets	3,737,400,000	3,906,400,000		4,113,400,000
Goodwill	346,100,000	344,300,000		347,100,000
Price Point	$ 1.0
Number of distribution centers	11
Goodwill, transfers in (out)			$ 55,300,000
Family Dollar
Segment Reporting Information [Line Items]
Net sales	$ 2,769,200,000	2,715,400,000
Gross profit	738,800,000	730,500,000
Depreciation and amortization expense	87,600,000	92,400,000
Operating income (loss)	107,400,000	73,400,000
Capital expenditures	63,700,000	44,600,000
Assets	12,089,700,000	12,088,300,000		12,219,400,000
Goodwill	$ 4,678,100,000	$ 4,678,100,000		$ 4,678,100,000
Number of distribution centers	11
CANADA \| Dollar Tree
Segment Reporting Information [Line Items]
Number of distribution centers	2