Long-term Debt - Convertible Notes (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	May 31, 2020
Debt Instrument [Line Items]
Net carrying amount	$ 2,817.8
2.75% Convertible Notes due 2026 | Convertible Notes
Debt Instrument [Line Items]
Principal	330.5	$ 330.5
Unamortized debt discount	0.0	(71.7)
Unamortized debt issuance costs	(6.2)	(5.3)
Net carrying amount	324.3	253.5
Carrying amount of equity component	$ 0.0	$ 88.2	$ 91.8