Segment and Geographic Information - Geographic Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								11 Months Ended	12 Months Ended
	Jan. 31, 2015	Nov. 01, 2014	Aug. 02, 2014	May 03, 2014	Feb. 01, 2014	Nov. 02, 2013	Aug. 03, 2013	May 04, 2013	Feb. 02, 2013	Jan. 31, 2015	Feb. 01, 2014
Geographic Areas, Revenues from External Customers [Abstract]
Total revenue	$ 14,209	$ 9,032	$ 8,459	$ 8,639	$ 14,025	$ 8,924	$ 8,734	$ 8,928	$ 38,252	$ 40,339	$ 40,611
Geographic Areas, Long-Lived Assets [Abstract]
Property, Plant and Equipment, Net	2,295				2,598				3,270	2,295	2,598
United States [Member]
Geographic Areas, Revenues from External Customers [Abstract]
Total revenue									33,222	36,055	35,831
Geographic Areas, Long-Lived Assets [Abstract]
Property, Plant and Equipment, Net	2,100				2,190				2,404	2,100	2,190
Europe [Member]
Geographic Areas, Long-Lived Assets [Abstract]
Property, Plant and Equipment, Net	0				0				352	0	0
Canada [Member]
Geographic Areas, Revenues from External Customers [Abstract]
Total revenue									4,818	4,047	4,522
Geographic Areas, Long-Lived Assets [Abstract]
Property, Plant and Equipment, Net	174				244				341	174	244
China [Member]
Geographic Areas, Long-Lived Assets [Abstract]
Property, Plant and Equipment, Net	0				139				142	0	139
Other [Member]
Geographic Areas, Revenues from External Customers [Abstract]
Total revenue									212	237	258
Geographic Areas, Long-Lived Assets [Abstract]
Property, Plant and Equipment, Net	$ 21				$ 25				$ 31	$ 21	$ 25