Shareholders' Equity (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended			12 Months Ended					1 Months Ended								12 Months Ended									1 Months Ended	12 Months Ended
	Jan. 28, 2012	Dec. 31, 2011	Jan. 30, 2010	Jan. 28, 2012		Jan. 29, 2011		Jan. 30, 2010	Dec. 31, 2011 Treasury Stock [Member]	Jan. 30, 2010 Treasury Stock [Member]	Dec. 31, 2011 Common Stock [Member]	Jan. 30, 2010 Common Stock [Member]	Dec. 31, 2011 Additional Paid-in Capital [Member]	Jan. 30, 2010 Additional Paid-in Capital [Member]	Dec. 31, 2011 Retained Earnings [Member]	Jan. 30, 2010 Retained Earnings [Member]	Jan. 28, 2012 November 2010 [Member]		Jan. 29, 2011 November 2010 [Member]		Jan. 29, 2011 March 2010 [Member]		Jan. 28, 2012 November 2011 [Member]		Jan. 28, 2012 November 2011 [Member] Accounts Payable [Member]	Feb. 29, 2012 Share Repurchase Program [Member]	Jan. 28, 2012 Share Repurchase Program [Member] November 2011 [Member]	Jan. 28, 2012 Dividend Declared [Member]
Stock Repurchased				32,535,000		7,621,000											3,431,000	[1]	1,907,000	[1]	5,714,000	[2]	2,116,000	[3]			4,000,000
Treasury Share Retirement				$ 0				$ 0	$ 1,341	$ 4,641	$ 19	$ 101	$ 286	$ 1,545	$ 1,036	$ 2,995
Retired shares of Treasury Stock		39,000,000	201,000,000
Board of Directors declared a special dividend, per share				$ 3
Board of Directors approved common stock repurchase amount																										500
Share repurchase program, remaining balance																			31		53		165
Stock repurchase program, stock repurchased, value				$ 1,194	[1]	$ 207	[2]										$ 109	[1]	$ 60	[1]	$ 147	[2]	$ 85	[3]	$ 4		$ 165
Common stock dividend payable per share																												$ 0.25
Amount of dividend increase over prior periods	$ 0.05

[1] The November 2010 repurchase program had $31 million remaining at the time it was cancelled in conjunction with the approval of the March 2011 repurchase program.

[2] The March 2010 repurchase program had $53 million remaining at the time it was cancelled in conjunction with the approval of the November 2010 repurchase program.

[3] The November 2011 repurchase program had $165 million remaining as of January 28, 2012.