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 6 Months Ended
Jun. 30, 2012
Jul. 02, 2011
Jun. 30, 2012
Jul. 02, 2011
Commitments and Contingencies Disclosure [Abstract]        
Beginning balance $ 20 $ 19 $ 20 $ 19
New warranties issued 16 8 25 17
Settlements (16) (10) (24) (18)
Changes in liability for pre-existing warranties, including expirations (2) 2 (3) 1
Ending balance $ 18 $ 19 $ 18 $ 19