Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified	Aug. 03, 2013
Senior notes
Fair Value Measurements
Interest rate (as a percent)	7.75%
Carrying Value | Senior secured term loan
Fair Value Measurements
Long-term loans and notes	$ 1,636
Carrying Value | Senior notes
Fair Value Measurements
Long-term loans and notes	1,007
Carrying Value | Senior subordinated notes
Fair Value Measurements
Long-term loans and notes	255
Fair Value | Senior secured term loan
Fair Value Measurements
Long-term loans and notes	1,645
Fair Value | Senior notes
Fair Value Measurements
Long-term loans and notes	1,079
Fair Value | Senior subordinated notes
Fair Value Measurements
Long-term loans and notes	$ 267