Summary of Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015	Jan. 02, 2016
Summary Of Accounting Policies [Line Items]
Long-term deferred income tax assets	$ 66.0		$ 66.0		$ 60.4
Deferred Tax Liabilities Non Current [Member]
Summary Of Accounting Policies [Line Items]
Current deferred income tax assets					109.9
Long-term deferred income tax assets					45.9
Current deferred income tax liabilities					0.3
Unconsolidated Affiliates [Member]
Summary Of Accounting Policies [Line Items]
Investments in unconsolidated affiliates	15.8		15.8		$ 13.3
Purchases from unconsolidated affiliates	$ 2.7	$ 2.7	$ 10.1	$ 10.4
Minimum [Member] | Unconsolidated Affiliates [Member]
Summary Of Accounting Policies [Line Items]
Percentage of ownership interest under equity method accounting	20.00%		20.00%
Maximum [Member] | Unconsolidated Affiliates [Member]
Summary Of Accounting Policies [Line Items]
Percentage of ownership interest under equity method accounting	50.00%		50.00%