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Commitments And Contingencies (Schedule Of Product Warranty Liability) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Apr. 02, 2011
Commitments And Contingencies [Abstract]    
Balance at beginning of period $ 36 $ 25
Warranty expense recognized 2 3
Warranty credits issued (1) (1)
Balance at end of period $ 37 $ 27