Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (Level 2, Fair Value, Measurements, Recurring, USD $) In Millions, unless otherwise specified	Oct. 27, 2012	Jan. 28, 2012	Oct. 29, 2011
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets measured at fair value on recurring basis	$ 56	$ 5	$ 4
Liabilities measured at fair value on recurring basis	1	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	49
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	6	5	4
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	1
Liabilities measured at fair value on recurring basis	$ 1	$ 2