Leases - Lease Cost and Other Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Finance leases
Amortization of ROU assets	$ 2.3	$ 2.6	$ 4.8	$ 5.3
Interest on lease liabilities	0.4	0.4	0.8	0.7
Operating leases	9.6	7.8	18.6	16.3
Short-term lease cost	0.7	0.9	1.3	1.3
Variable lease cost	1.0	1.8	2.8	3.4
Total lease cost	$ 14.0	$ 13.5	28.3	27.0
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows - finance leases			1.7	2.5
Operating cash flows - operating leases			18.5	15.6
Financing cash flows - finance leases			4.3	5.7
ROU assets obtained in exchange for new lease liabilities
ROU assets obtained in exchange for new finance lease liabilities			8.3	4.1
ROU assets obtained in exchange for new operating lease liabilities			$ 40.8	$ 14.3
Finance leases
Remaining lease term (in years)	8 years 2 months 12 days	5 years 10 months 24 days	8 years 2 months 12 days	5 years 10 months 24 days
Discount rate	6.50%	4.70%	6.50%	4.70%
Operating leases
Remaining lease term (in years)	4 years 3 months 18 days	4 years 2 months 12 days	4 years 3 months 18 days	4 years 2 months 12 days
Discount rate	5.50%	4.50%	5.50%	4.50%