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Revenues from Contracts - Contract Balances (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]    
Unbilled receivables $ 105.4 $ 81.9
Change in unbilled receivables 23.5  
Deferred revenue - current (1,105.2) (1,106.3)
Change in deferred revenue - current 1.1  
Deferred revenue - non-current (96.8) (69.9)
Change in deferred revenue - non-current (26.9)  
Net contract assets/(liabilities) (1,096.6) $ (1,094.3)
Change in net contract assets/(liabilities) $ (2.3)