Fair Value Measurements (Fair Value, Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Oct. 29, 2016	Apr. 30, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015	Jan. 30, 2016	May 02, 2015
Available-for-sale Securities, Gross Realized Gains				$ 4	$ 0
Assets:
Cash and Cash Equivalents	$ 654		$ 1,311	654	1,311	$ 2,548
Available-for-sale Securities	8		13	8	13	22
Foreign Currency Cash Flow Hedge Asset at Fair Value	26		27	26	27	27
Interest Rate Fair Value Hedges	6		10	6	10	11
Proceeds from Sale of Available-for-sale Securities, Equity		$ 10
Liabilities:
Marketable Securities, Realized Gain (Loss)	0	$ (3)	0	(3)	0
Fair Value, Inputs, Level 1 [Member]
Assets:
Cash and Cash Equivalents	654		1,311	654	1,311	2,548
Available-for-sale Securities	8		13	8	13	22	$ 50
Foreign Currency Cash Flow Hedge Asset at Fair Value	0			0		0
Interest Rate Fair Value Hedges	0		0	0	0	0
Marketable Securities, Equity Securities, Current			10		10
Liabilities:
Foreign Currency Cash Flow Hedge Liability at Fair Value			0		0
Fair Value, Inputs, Level 2 [Member]
Assets:
Cash and Cash Equivalents	0		0	0	0	0
Available-for-sale Securities	0		0	0	0	0
Foreign Currency Cash Flow Hedge Asset at Fair Value	26		27	26	27	27
Interest Rate Fair Value Hedges	6		10	6	10	11
Fair Value, Inputs, Level 3 [Member]
Assets:
Cash and Cash Equivalents	0		0	0	0	0
Available-for-sale Securities	0		0	0	0	0
Foreign Currency Cash Flow Hedge Asset at Fair Value	0			0		0
Interest Rate Fair Value Hedges	$ 0		0	$ 0	0	$ 0
Liabilities:
Foreign Currency Cash Flow Hedge Liability at Fair Value			$ 0		$ 0