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Revenues from Contracts - Contract Balances (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]    
Unbilled receivables $ 110.0 $ 95.3
Change in unbilled receivables 14.7  
Deferred revenue - current (1,120.3) (1,130.2)
Change in deferred revenue - current 9.9  
Deferred revenue - non-current (111.5) (75.3)
Change in deferred revenue - non-current (36.2)  
Net contract assets/(liabilities) (1,121.8) $ (1,110.2)
Change in net contract assets/(liabilities) $ (11.6)