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Warranty Liability (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Changes in warranty liability    
Balance at beginning of period $ 164 $ 138
Provision 50 54
Settlements (60) (55)
Acquisitions 1 32
Adjustments   (2)
Balance at end of period $ 155 $ 167