Shareholders' Equity Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation	$ 279	$ 271	$ 382	$ 485
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	0	0	0	7
Accumulated other comprehensive income	279	271	382	$ 492
Foreign currency translation adjustments	10	(44)	(103)
Unrealized loss on available-for-sale investments	0	0	(3)
Reclassification of foreign currency translations adjustments into earnings due to sale of business	(2)	(67)	0
Reclassification of (gains) losses on available-for-sale investments into earnings			(4)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustments	10	(44)	(103)
Unrealized loss on available-for-sale investments			(3)
Reclassification of foreign currency translations adjustments into earnings due to sale of business	$ (2)	(67)
Reclassification of (gains) losses on available-for-sale investments into earnings			$ (4)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification of foreign currency translations adjustments into earnings due to sale of business		$ 67