Fair Value Measurements (Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016
Proceeds from Sale of Available-for-sale Securities, Equity	$ 10
Assets:
Cash and Cash Equivalents	1,934	$ 2,548
Investments, Fair Value Disclosure	5	22
Interest Rate Fair Value Hedge Asset at Fair Value	2	11
Foreign Currency Cash Flow Hedge Asset at Fair Value	18	27
Foreign Currency Cash Flow Hedge Liability at Fair Value	1	0
Fair Value, Inputs, Level 1
Assets:
Cash and Cash Equivalents	1,934	2,548
Investments, Fair Value Disclosure	5	22
Interest Rate Fair Value Hedge Asset at Fair Value	0	0
Foreign Currency Cash Flow Hedge Asset at Fair Value	0	0
Foreign Currency Cash Flow Hedge Liability at Fair Value	0
Fair Value, Inputs, Level 2
Assets:
Cash and Cash Equivalents	0	0
Investments, Fair Value Disclosure	0	0
Interest Rate Fair Value Hedge Asset at Fair Value	2	11
Foreign Currency Cash Flow Hedge Asset at Fair Value	18	27
Foreign Currency Cash Flow Hedge Liability at Fair Value	1
Fair Value, Inputs, Level 3
Assets:
Cash and Cash Equivalents	0	0
Investments, Fair Value Disclosure	0	0
Interest Rate Fair Value Hedge Asset at Fair Value	0	0
Foreign Currency Cash Flow Hedge Asset at Fair Value	0	$ 0
Foreign Currency Cash Flow Hedge Liability at Fair Value	$ 0