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Summary of Accounting Policies - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jul. 02, 2016
Jul. 04, 2015
Jul. 02, 2016
Jul. 04, 2015
Jan. 02, 2016
Summary Of Accounting Policies [Line Items]          
Long-term deferred income tax assets $ 61.6   $ 61.6   $ 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 15.1   15.1   $ 13.3
Purchases from unconsolidated affiliates $ 3.2 $ 3.8 $ 7.4 $ 7.7  
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%