Commitments and Contingencies - Reconciliation of Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Cash and cash equivalents	$ 281.9	$ 550.2	$ 234.6
Professional fee escrow	0.2	0.2
Bank collateral guarantees	97.4	32.5
Pension collateral guarantees	8.6	9.4
Restricted cash and cash equivalents	106.2	42.1
Total cash, cash equivalents, and restricted cash	$ 388.1	$ 592.3	$ 246.4	$ 319.1