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Commitments and Contingencies - Summary of Product Warranty Accrual Activity (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Warranty reserve:        
Beginning of period $ 17.5 $ 18.9 $ 17.2 $ 16.0
Additions 3.0 1.1 10.9 10.4
Usage (3.3) (2.2) (10.9) (8.6)
End of period $ 17.2 $ 17.8 $ 17.2 $ 17.8