Debt (Details 2) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Jul. 31, 2013	Aug. 03, 2013	Jul. 11, 2013	Feb. 02, 2013		Aug. 04, 2012
Long-term Debt.
Total long-term debt		$ 1,678		$ 1,700		$ 1,707
Less: current portion		(44)		(547)	[1]	(542)	[1]
Total long-term debt, less current portion		1,634		1,153		1,165
Long-term debt, fair value		1,673		1,652		1,669
2013 Notes [Member]
Long-term Debt.
Total long-term debt		0		500		500
2016 Notes [Member]
Long-term Debt.
Total long-term debt		349		349		349
2018 Notes [Member]
Long-term Debt.
Total long-term debt		500		0		0
Debt Instrument, Face Amount			500
Debt Instrument, Interest Rate, Stated Percentage		5.00%
Proceeds from Debt, Net of Issuance Costs	495
Underwriting Discount on Issuance of Debt	5
2021 Notes [Member]
Long-term Debt.
Total long-term debt		648		648		648
Financing Lease Obligations [Member]
Long-term Debt.
Total long-term debt		109		122		136
Capital Lease Obligations [Member]
Long-term Debt.
Total long-term debt		71		80		73
Other debt [Member]
Long-term Debt.
Total long-term debt		$ 1		$ 1		$ 1
2018 Notes [Member]
Long-term Debt.
Debt Instrument, Redemption Price, as Percentage of Principal Amount		100.00%
Debt Instrument, Treasury Rate Basis Points for Redemption		50

[1] (1) Our 2013 Notes due July 15, 2013, which were retired on July 15, 2013, are classified in the current portion of long-term debt as of February 2, 2013, and August 4, 2012.