Income and Other Taxes, Unrecognized Tax Benefit Reconciliation (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 01, 2013	Feb. 03, 2012	Jan. 28, 2011
Unrecognized Tax Benefits
Balance at period start	$ 2,194	$ 1,983	$ 1,793
Increases related to tax positions of the current year	219	260	262
Increases related to tax positions of prior years	107	30	22
Reductions for tax positions of prior years	(44)	(43)	(41)
Lapse of statute of limitations	(19)	(32)	(32)
Audit settlements	(11)	(4)	(21)
Balance at period end	$ 2,446	$ 2,194	$ 1,983