Restructuring and Other Charges (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 31, 2016	Jan. 25, 2015	Jan. 26, 2014
Restructuring and Other Charges [Abstract]
Restructuring and other charges		$ 131	$ 0	$ 0
Tax Reserve Release Related to Icera		49
Icera Deferred Tax Asset Write-off		27
Employee severance and related costs		82
Fixed assets impairment		18
Tax subsidy impairment		17
Facilities and related costs		9
Other exit costs		5
Additional restructuring charges minimum		1
Additional restructuring charges maximum		$ 2
Restructuring impact on workforce		5.00%
Restructuring Reserve, Beginning Balance	[1]	$ 0
Cash payments		(63)
Non-cash adjustments		(45)
Restructuring Reserve, Ending Balance	[1]	$ 23	$ 0

[1] Please refer to Note 17 of these Notes to the Consolidated Financial Statements for a discussion regarding restructuring and other charges.