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Earnings Per Share - Schedule of Computations of Weighted Average Shares Outstanding (Detail) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]      
Weighted-average shares outstanding 473.3 485.7 418.3
Share-based payment awards classified as participating securities 0.4 1.0 1.5
Basic weighted-average shares outstanding 473.7 486.7 421.3
Dilutive securities   1.3  
Diluted weighted-average shares outstanding 473.7 488.0 421.3
Jarden Acquisition [Member]      
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]      
Dilutive Securities, Effect on Basic Earnings Per Share     $ 1.5