Derivative Financial Instrument (Details) - USD ($) $ in Millions		Jan. 31, 2016	Jan. 25, 2015
Summary of Derivative Instruments [Abstract]
Interest rate swap, Notional Amount		$ 200	$ 0
Interest Rate Swap, at Fair Value	[1]	(7)	0
Gain (loss) on interest rate swap		$ (4)	$ 0

[1] Please refer to Note 9 of these Notes to the Consolidated Financial Statements for a discussion regarding our interest rate swap.