Commitments and Contingencies - Additional Information (Detail) $ in Millions	9 Months Ended
	Oct. 04, 2015 USD ($)
Purchase Commitment, Excluding Long-term Commitment
Aggregate purchase commitments	$ 219.6
Purchase commitments less than one year	$ 214.2
Maximum
Purchase Commitment, Excluding Long-term Commitment
Purchase commitments period	1 year