Quarterly report pursuant to Section 13 or 15(d)

Commitments And Contingencies (Changes In Company's Potential Liability For Product Warranty) (Details)

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Commitments And Contingencies (Changes In Company's Potential Liability For Product Warranty) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 29, 2012
Oct. 01, 2011
Sep. 29, 2012
Oct. 01, 2011
Commitments and Contingencies Disclosure [Abstract]        
Beginning balance $ 18 $ 19 $ 20 $ 19
New warranties issued 6 10 22 27
Settlements (7) (9) (23) (27)
Changes in liability for pre-existing warranties, including expirations 0 0 (2) 1
Ending balance $ 17 $ 20 $ 17 $ 20