Dollar Tree, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

ACQUISITION - Additional Information (Details)

ACQUISITION - Additional Information (Details) $ / shares in Units, $ in Millions			3 Months Ended										7 Months Ended	12 Months Ended
	Nov. 01, 2015 USD ($) store	Jul. 06, 2015 USD ($) intangible_liability intangible_asset $ / shares shares	Feb. 03, 2018 USD ($)	Jul. 29, 2017 USD ($)	Apr. 29, 2017 USD ($)	Jan. 28, 2017 USD ($)	Oct. 29, 2016 USD ($)	Jul. 30, 2016 USD ($)	Apr. 30, 2016 USD ($)	Oct. 31, 2015 USD ($)	Aug. 01, 2015 USD ($)	May 02, 2015 USD ($)	Jan. 30, 2016 USD ($)	Feb. 03, 2018 USD ($) $ / shares	Jan. 28, 2017 USD ($)	Jan. 30, 2016 USD ($)
Business Acquisition [Line Items]
Acquisition cost paid in common stock and equity compensation														$ 0.0	$ 0.0	$ 2,290.1
Operating income			$ 765.6			$ 586.5	$ 425.2	$ 419.5	$ 388.8	$ 342.4	$ 357.2	$ 418.7		1,999.1	1,704.8	1,049.7
Settlement received			35.0
Receivable impairment				$ 2.6	$ 50.9									18.5	0.0	0.0
Accounts receivable - divestiture-related			0.0			55.9								0.0	55.9
Expected Synergies														300.0
Number of separately identified Intangible assets acquired \| intangible_asset		3
Number of separately identified intangible liabilities acquired \| intangible_liability		1
Favorable lease rights, net of accumulated amortization of $230.9 and $159.3, respectively			375.3			468.6								375.3	468.6
Unfavorable lease rights, net of accumulated amortization of $61.1 and $39.6, respectively			100.0			124.0								100.0	124.0
Net sales			$ 6,360.6			5,635.3	$ 5,316.6	$ 5,281.2	$ 5,287.1	$ 5,001.6	$ 4,996.3	$ 5,085.8		22,245.5	20,719.2	15,498.4
Inventory write-down													$ 73.0
Finite-Lived Intangible Assets, Purchase Accounting Adjustments													156.8
Business Combination, Integration Related Costs													13.4
Family Dollar [Member]
Business Acquisition [Line Items]
Business Acquisition, Share Price \| $ / shares		$ 59.60
Business Combination, Consideration Transferred		$ 6,800.0
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares \| shares		28,500,000
Acquisition cost paid in common stock and equity compensation		$ 2,300.0
Number of stores required for divestiture \| store	330
Number of Stores Required for Divestiture that Were Already Opened \| store	325
Operating income	$ 45.5												30.8
Number of Stores Included In Divestiture With Guaranteed Payments \| store	316
Indefinite-lived Intangible Assets Acquired		3,100.0
Favorable lease rights, net of accumulated amortization of $230.9 and $159.3, respectively		629.2
Unfavorable lease rights, net of accumulated amortization of $61.1 and $39.6, respectively		164.3
Amortization expense														69.2	75.7	$ 45.3
Finite-lived Intangible Assets Acquired														5.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt						$ 497.0									497.0
Net sales													$ 6,162.0
Business Acquisition, Pro Forma Net Income (Loss), Excluded Amount														$ 20.9
Business Acquisition, Pro Forma Income (Loss) From Continuing Operations, Net Of Tax, Per Share, Basic And Diluted, Excluded Amount \| $ / shares														$ 0.09
Business Acquisition, Transaction Costs															$ 39.2
Family Dollar [Member] \| Private Placement [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt		185.2
Family Dollar [Member] \| Senior Notes [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		$ 300.0
Debt Instrument, Interest Rate, Stated Percentage		5.00%
Senior Notes		$ 311.8
Family Dollar [Member] \| Common Stock [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Conversion of Stock, Shares Converted \| shares		0.2484