Repurchase of Common Stock (Details) - USD ($) shares in Millions, $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended	36 Months Ended
	Dec. 03, 2015	Oct. 31, 2015	Oct. 31, 2015	Feb. 03, 2018	Mar. 03, 2015	Jun. 30, 2011
Equity [Abstract]
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 3,600	$ 3,600		$ 4,000
Stock Repurchase Program, Authorized Amount					$ 1,000	$ 5,000
Stock Repurchase Program, Period in Force				3 years
Stock Repurchased During Period, Shares	3.0	1.8	11.3
Stock Repurchased During Period, Value	$ 95	$ 64	$ 388