Revenues from Contracts - Contract Balances (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Unbilled receivables	$ 108.1	$ 91.5
Change in unbilled receivables	16.6
Deferred revenue - current	(1,279.8)	(1,370.7)
Change in deferred revenue - current	90.9
Deferred revenue - non-current	(116.9)	(111.5)
Change in deferred revenue - non-current	(5.4)
Net contract assets/(liabilities)	(1,288.6)	$ (1,390.7)
Change in net contract assets/(liabilities)	$ 102.1