Commitments and Contingencies - Leases Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 58.5	$ 56.3	$ 55.5
Sublease income	(5.9)	(6.0)
Total operating lease cost	52.6	50.3
Cash paid for amounts included in the measurement of operating lease liabilities	$ 68.3	$ 64.1
Weighted-average remaining lease term	10 years 4 months 24 days	10 years 9 months 18 days
Weighted-average discount rate	4.30%	4.20%