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	Jan. 28, 2017 USD ($)	Oct. 29, 2016 USD ($)	Jul. 30, 2016 USD ($)	Apr. 30, 2016 USD ($)	Jan. 30, 2016 USD ($)	Oct. 31, 2015 USD ($)	Aug. 01, 2015 USD ($)	May 02, 2015 USD ($)	Jan. 30, 2016 USD ($)	Jan. 28, 2017 USD ($) $ / shares	Jan. 30, 2016 USD ($) $ / shares	Jan. 31, 2015 USD ($)
Business Acquisition [Line Items]
Acquisition cost paid in common stock and equity compensation												$ 0.0	$ 2,290.1	$ 0.0
Operating income			$ 586.5	$ 342.4	$ 357.2	$ 418.7	$ 469.7	$ 223.7	$ 123.4	$ 232.8		1,704.8	1,049.7	1,040.2
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			468.6				569.4				$ 569.4	468.6	569.4
Unfavorable lease rights, net			124.0				149.3				149.3	124.0	149.3
Net sales			$ 5,635.3	$ 5,001.6	$ 4,996.3	$ 5,085.8	5,365.3	$ 4,945.2	$ 3,011.2	$ 2,176.7		20,719.2	15,498.4	8,602.2
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		629.2
Unfavorable lease rights, net		164.3
Amortization of Intangible Assets												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		497.0
Net sales											$ 6,162.0
Business Acquisition, Pro Forma Net Income (Loss), Excluded Amount												$ 20.9	$ 25.8
Business Acquisition, Pro Forma Income (Loss) From Continuing Operations, Net Of Tax, Per Share, Basic And Diluted, Excluded Amount \| $ / shares												$ 0.09	$ 0.11
Business Acquisition, Transaction Costs													$ 39.2	$ 28.5
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