Investment in HD Supply Holdings, Inc. (Narrative) (Details) (HD Supply Inc [Member], USD $)	3 Months Ended			9 Months Ended
	Nov. 02, 2014	Aug. 03, 2014	May 04, 2014	Nov. 02, 2014	Feb. 02, 2014	Jan. 31, 2010
HD Supply Inc [Member]
Schedule of Cost Method Investments [Line Items]
Cost Method Investments, Common Stock Shares Owned	8,200,000			8,200,000	16,300,000
Cost Method Investment, Ownership Percentage	4.00%			4.00%	8.00%
Cost Method Investments, Cost Basis						$ 0
Cost Method Investments, Realized Gains	$ 100,000,000	$ 15,000,000	$ 97,000,000	$ 212,000,000
Cost Method Investments, Common Stock Shares Sold	3,600,000	600,000	3,900,000