Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified	Oct. 27, 2012
Carrying Value | Senior secured term loan
Fair Value Measurements
Long-term loans and notes	$ 1,787
Carrying Value | Senior notes
Fair Value Measurements
Long-term loans and notes	1,008
Carrying Value | Senior subordinated notes
Fair Value Measurements
Long-term loans and notes	393
Carrying Value | Subordinated discount notes
Fair Value Measurements
Long-term loans and notes	180
Fair Value | Senior secured term loan
Fair Value Measurements
Long-term loans and notes	1,799
Fair Value | Senior notes
Fair Value Measurements
Long-term loans and notes	1,080
Fair Value | Senior subordinated notes
Fair Value Measurements
Long-term loans and notes	411
Fair Value | Subordinated discount notes
Fair Value Measurements
Long-term loans and notes	$ 188