Leases (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Leases
Operating lease cost	$ 25.9	$ 23.4	$ 51.1	$ 47.0
Cash payments for operating leases			51.3	46.7
Right-of-use assets obtained in exchange for operating lease obligations			$ 54.0	$ 35.6
Weighted average remaining lease term - operating leases	6 years 2 months 12 days		6 years 2 months 12 days		5 years 9 months 18 days
Weighted average discount rate - operating leases	4.50%		4.50%		4.30%
Maturities of operating lease liabilities
2024 (remaining six months)	$ 34.9		$ 34.9
2025	60.8		60.8
2026	47.9		47.9
2027	37.4		37.4
2028	29.7		29.7
Thereafter	74.4		74.4
Total operating lease payments	285.1		285.1
Less: imputed interest	(40.1)		(40.1)
Total operating lease liabilities	$ 245.0		$ 245.0