Comprehensive Income (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Nov. 01, 2014	Oct. 31, 2015	Nov. 01, 2014
Accumulated Other Comprehensive Income (Loss), Beginning Balance			$ 35	$ 40
Other Comprehensive Income Before Reclassifications			13	3
Amounts Reclassified from Accumulated Other Comprehensive Income			(7)	(5)
Current-period Other Comprehensive Income (Loss)	$ 0	$ 6	6	(2)
Accumulated Other Comprehensive Income (Loss), Ending Balance	41	38	41	38
Other Income	0	1	75	6
Provision for Income Taxes	96	73	335	279
Net Income	164	132	617	477
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Beginning Balance			51	30
Other Comprehensive Income Before Reclassifications			5	0
Amounts Reclassified from Accumulated Other Comprehensive Income			0	0
Current-period Other Comprehensive Income (Loss)			5	0
Accumulated Other Comprehensive Income (Loss), Ending Balance	56	30	56	30
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Beginning Balance			(16)	10
Other Comprehensive Income Before Reclassifications			6	3
Amounts Reclassified from Accumulated Other Comprehensive Income			(7)	(5)
Current-period Other Comprehensive Income (Loss)			(1)	(2)
Accumulated Other Comprehensive Income (Loss), Ending Balance	(17)	8	(17)	8
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss), Beginning Balance			0	0
Other Comprehensive Income Before Reclassifications			2	0
Amounts Reclassified from Accumulated Other Comprehensive Income			0	0
Current-period Other Comprehensive Income (Loss)			2	0
Accumulated Other Comprehensive Income (Loss), Ending Balance	2	0	2	0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Other Income	3	(13)	(7)	(5)
Provision for Income Taxes	0	0	0	0
Net Income	$ 3	$ (13)	$ (7)	$ (5)