XML 59 R46.htm IDEA: XBRL DOCUMENT v3.20.2
Contracts with Customers - Summary of Unbilled Receivables, Contract Assets and Contract Liabilities from Contracts with Customers (Detail) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Contract With Customer Asset And Liability [Abstract]    
Unbilled receivables $ 739.7 $ 556.4
Deferred contract costs 69.6 98.3
Deferred revenue $ 531.4 $ 503.8