Leases - Lease Cost and Other Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Finance leases
Amortization of ROU assets	$ 2.3	$ 2.6	$ 7.1	$ 7.9
Interest on lease liabilities	0.4	0.3	1.2	1.0
Operating leases	10.8	7.3	29.4	23.6
Short-term lease cost	0.9	0.9	2.2	2.2
Variable lease cost	2.1	1.9	4.9	5.3
Total lease cost	$ 16.5	$ 13.0	44.8	40.0
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows - finance leases			3.5	4.2
Operating cash flows - operating leases			27.5	22.4
Financing cash flows - finance leases			6.4	7.7
ROU assets obtained in exchange for new lease liabilities
ROU assets obtained in exchange for new finance lease liabilities			11.6	5.4
ROU assets obtained in exchange for new operating lease liabilities			$ 46.6	$ 29.7
Finance leases
Remaining lease term (in years)	7 years 9 months 18 days	5 years 10 months 24 days	7 years 9 months 18 days	5 years 10 months 24 days
Discount rate	6.60%	4.70%	6.60%	4.70%
Operating leases
Remaining lease term (in years)	4 years 2 months 12 days	4 years 4 months 24 days	4 years 2 months 12 days	4 years 4 months 24 days
Discount rate	5.70%	4.70%	5.70%	4.70%