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Warranty Liability (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Changes in warranty liability    
Beginning of period $ 138 $ 143
Provision 54 58
Settlements (55) (59)
Acquisitions 32 2
Adjustments (2) (12)
End of period $ 167 $ 132