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Commitments and Contingencies - Summary of Product Warranty Accrual Activity (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 04, 2015
Jun. 28, 2014
Jul. 04, 2015
Jun. 28, 2014
Commitments and Contingencies Disclosure [Abstract]        
Beginning of period $ 17.1 $ 16.7 $ 17.3 $ 17.0
Additions 3.9 4.0 7.6 6.9
Usage (3.0) (3.0) (6.9) (6.2)
End of period $ 18.0 $ 17.7 $ 18.0 $ 17.7