ACQUISITION - Purchase Price Allocation (Details) - USD ($) $ in Millions		7 Months Ended	12 Months Ended
	Jul. 06, 2015	Jan. 30, 2016	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Business Acquisition [Line Items]
Goodwill			$ 5,025.2	$ 5,023.5
Acquisition cost paid in common stock and equity compensation			0.0	0.0	$ 2,290.1
Acquisition cost paid in cash, net of cash acquired			$ 0.0	0.0	$ 6,527.7
Family Dollar [Member]
Business Acquisition [Line Items]
Cash				305.3
Short-term investments				4.0
Accounts receivable				71.1
Inventory				1,765.5
Taxes receivable				32.9
Other current assets				100.1
Property, plant and equipment				1,893.3
Assets available for sale				10.1
Goodwill				4,859.9
Intangible assets, net				3,570.4
Other assets				78.1
Long-term debt, including current portion				(497.0)
Accounts payable				(635.2)
Other current liabilities				(563.4)
Deferred tax liabilities, net				(1,618.4)
Other liabilities				(253.6)
Total purchase price				$ 9,123.1
Less: Cash acquired		$ (305.3)
Total purchase price, net of cash acquired		8,817.8
Acquisition cost paid in common stock and equity compensation	$ 2,300.0
Acquisition cost paid in cash, net of cash acquired		6,527.7
Family Dollar [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Acquisition cost paid in common stock and equity compensation		2,272.4
Family Dollar [Member] | Stock Compensation Plan [Member]
Business Acquisition [Line Items]
Acquisition cost paid in common stock and equity compensation		$ 17.7