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Warranty Liability (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Changes in warranty liability    
Balance at beginning of period $ 149 $ 164
Provision 45 50
Settlements (56) (60)
Adjustments (3) 1
Balance at end of period $ 135 $ 155