Leases - Lease Cost and Other Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Finance leases
Amortization of ROU assets	$ 2.0	$ 2.5
Interest on lease liabilities	0.4	0.4
Operating leases	9.4	9.0
Short-term lease cost	0.2	0.6
Variable lease cost	1.7	1.8
Total lease cost	13.7	14.3
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows - finance leases	0.9	1.1
Operating cash flows - operating leases	9.8	9.1
Financing cash flows - finance leases	1.8	2.3
ROU assets obtained in exchange for new lease liabilities
ROU assets obtained in exchange for new finance lease liabilities	3.3	5.9
ROU assets obtained in exchange for new operating lease liabilities	$ 2.3	$ 20.8
Finance leases
Remaining lease term (in years)	5 years 10 months 24 days	8 years 3 months 18 days
Discount rate	7.50%	6.30%
Operating leases
Remaining lease term (in years)	4 years 3 months 18 days	4 years 4 months 24 days
Discount rate	6.00%	5.30%