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Warranty Liability (Details) - USD ($)
$ in Millions
6 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Changes in warranty liability    
Beginning of period $ 138 $ 143
Provision 35 37
Settlements (36) (37)
Acquisitions 28 2
Adjustments (9) (6)
End of period $ 156 $ 139