Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (Level 2, Fair Value, Measurements, Recurring, USD $) In Millions, unless otherwise specified	Apr. 28, 2012	Jan. 28, 2012	Apr. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets measured at fair value on recurring basis	$ 55	$ 5	$ 9
Liabilities measured at fair value on recurring basis	2	2
Short-term Investment
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets measured at fair value on recurring basis	50
Auction rate security
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets measured at fair value on recurring basis	5	5	5
Forward foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets measured at fair value on recurring basis			4
Liabilities measured at fair value on recurring basis	$ 2	$ 2