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Financial Instruments - Effects of Derivative Financial Instruments on Consolidated Statements of Income (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (Loss) Recognized in Income $ 5.7 $ (1.1) $ (1.5)
Cash flow hedge [Member] | Cost of products sold [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (Loss) Recognized in Income 2.0 0.9 (3.5)
Fair value hedge [Member] | Other (income) expense, net [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (Loss) Recognized in Income $ 3.7 $ (2.0) $ 2.0