Fair Value Measurements (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - Level 2 - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Jan. 28, 2017	Jan. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets measured at fair value on recurring basis	$ 9	$ 9
Liabilities measured at fair value on recurring basis	3
Available-for-sale Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets measured at fair value on recurring basis	6	6
Forward Foreign Exchange Contracts [Member] | Derivative Financial Instruments, Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Liabilities measured at fair value on recurring basis	3
Forward Foreign Exchange Contracts [Member] | Derivative Financial Instruments, Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets measured at fair value on recurring basis	$ 3	$ 3