Commitments and Contingencies - Reconciliation of Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Cash and cash equivalents	$ 276.7	$ 550.2	$ 504.6
Professional fee escrow	0.2	0.2
Bank collateral guarantees	74.6	32.5
Pension collateral guarantees	8.6	9.4
Restricted cash and cash equivalents	83.4	42.1
Total cash, cash equivalents, and restricted cash	$ 360.1	$ 592.3	$ 541.8	$ 319.1