Stock Incentive Plan (Narrative) (Details) (USD $)	12 Months Ended
	Jan. 28, 2012 years	Jan. 29, 2011	Jan. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares approved for issuance under Stock Incentive Plan	321,800,000
Shares available for future grants	29,600,000
Unrecognized compensation cost related to nonvested share-based compensation	$ 97,800,000
Unrecognized compensation cost weighted-average recognition period, years	2
Performance-based stock, granted	298,500	1,242,000	940,500
Options granted at market price in percentage	100.00%
Vesting period of grant, years	3
Term in which vesting period starts after grant, years	1
Maximum term of grant, years	10
Intrinsic value of options exercised	210,900,000	143,300,000	109,200,000
Options outstanding expected to vest represents total unvested options adjusted for anticipated forfeitures	16,400,000
Shares granted weighted average grant date fair value	$ 24.81	$ 23.08	$ 12.96
Fair value of performance-based restricted stock that vested	10,000,000	7,000,000	6,700,000
Number of annual deferred share awards awarded to outside directors	2
Annual deferred share awards, common stock value	$ 62,500
Awards and related compensation costs recognized if threshold targets are not met	zero
Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred shares outstanding	232,434
Number of awards that vest immediately and is payable, with accumulated dividends	1
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based restricted stock and other awards, period	3
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based restricted stock and other awards, period	1