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Financial Instruments - Effects of Derivative Financial Instruments on Consolidated Statements of Income (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]        
(Loss) Gain Recognized in Income $ (1.0) $ (0.9) $ (0.5) $ (1.3)
Cash flow hedge | Cost of products sold [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
(Loss) Gain Recognized in Income (0.1) (1.2) 0.9 (2.6)
Fair value hedge [Member] | Other (income) expense, net [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
(Loss) Gain Recognized in Income $ (0.9) $ 0.3 $ (1.4) $ 1.3