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Supplemental Disclosures of Cash Flow Information - Cash Equivalents And Restricted Cash (Detail) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Cash and Cash Equivalents [Abstract]        
Cash and cash equivalents $ 604.8 $ 607.2 $ 681.2  
Restricted cash 2,019.1 1,629.6 1,623.8  
Total cash, cash equivalents and restricted cash $ 2,623.9 $ 2,236.8 $ 2,305.0 $ 1,937.6