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Derivative Financial Instrument (Details) - USD ($)
$ in Millions
Oct. 25, 2015
Jan. 25, 2015
Notional Amount and Fair Value of the Interest Rate Swap [Abstract]    
Derivative, Notional Amount $ 200 $ 0
Fair value of interest rate swap liability (3) 0
Gain (loss) on interest rate swap in AOCI $ (3) $ 0