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Supplemental Disclosures of Cash Flow Information - Cash Flow (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Cash and Cash Equivalents [Abstract]    
Interest paid $ 29.5 $ 28.0
Income taxes recovered, net $ (1.8)  
Income taxes paid, net   $ 11.6