XML 51 R81.htm IDEA: XBRL DOCUMENT v3.19.3
Supplemental Disclosures of Cash Flow Information - Cash Equivalents And Restricted Cash (Detail) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Dec. 31, 2017
Cash and Cash Equivalents [Abstract]        
Cash and cash equivalents $ 578.9 $ 607.2 $ 605.0  
Restricted cash 2,028.4 1,629.6 1,655.5  
Total cash, cash equivalents and restricted cash $ 2,607.3 $ 2,236.8 $ 2,260.5 $ 2,305.0