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Schedule of Effect of Derivative Instruments in Statement of Operations Recognized (Parenthetical) (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 01, 2017
Oct. 02, 2016
Oct. 01, 2017
Oct. 02, 2016
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) on foreign currency transactions $ (1.4) $ 1.9 $ (2.3) $ 12.2