Restructuring and Other Charges (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Oct. 25, 2015	Oct. 26, 2014	Oct. 25, 2015	Oct. 26, 2014
Restructuring and Other Charges [Abstract]
Severance Costs		$ 2		$ 58
Tax subsidy impairment - restructuring charge		0		17
Fixed assets impairment - restructuring charge		3		14
Facilities and related costs - restructuring charge		2		4
Other exit costs		1		4
Restructuring and other charges		$ 8	$ 0	97	$ 0
Additional restructuring charges in FY16 - minimum				25
Additional restructuring charges in FY16 - maximum				$ 35
Restructuring impact on workforce		5.00%		5.00%
Restructuring reserve beg balance		$ 18		$ 0
Payments for Restructuring		(7)		(46)
Restructuring Reserve, Settled without Cash		(4)		(36)
Restructuring reserve end balance	[1]	$ 15		$ 15

[1] Please refer to Note 15 of these Notes to Condensed Consolidated Financial Statements for a discussion regarding the accrued restructuring and other charges.