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Financial Instruments - Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Derivative [Line Items]        
Comprehensive income (loss) $ (9.3) $ 0.8 $ 76.0 $ (14.3)
Foreign currency contract        
Derivative [Line Items]        
Gains (losses) recognized in accumulated other comprehensive loss (5.5) (22.3) 68.1 (77.2)
(Gains) losses reclassified from accumulated other comprehensive loss to (3.8) 23.1 7.9 62.9
Foreign currency contract | Net sales        
Derivative [Line Items]        
(Gains) losses reclassified from accumulated other comprehensive loss to 0.8 2.2 1.4 3.6
Foreign currency contract | Cost of sales        
Derivative [Line Items]        
(Gains) losses reclassified from accumulated other comprehensive loss to $ (4.6) $ 20.9 $ 6.5 $ 59.3