Leases - Lease Expense and Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Lease expense
Amortization of finance lease right of use assets	$ 0.2	$ 0.0	$ 6.0
Interest on finance lease liabilities	1.8	0.8	0.9
Operating lease expense	5.2	4.7	6.1
Short-term lease expense	0.6	1.2	0.9
Lease expense	7.8	6.7	13.9
Other information
Operating cash flows from finance leases	1.8	0.8	0.9
Operating cash flows from operating leases	7.1	6.8	5.7
Financing cash flows from finance leases	0.0	0.0	6.0
Right-of-use asset obtained in exchange for finance lease liabilities	153.2	32.8	57.6
Right of use assets obtained in exchange for operating lease liabilities	$ 2.6	$ 18.3	$ 0.0
Weighted average remaining lease term - finance leases	50 years 2 months 12 days	49 years 4 months 24 days	30 years
Weighted average remaining lease term - operating leases	25 years 1 month 6 days	22 years 4 months 24 days	12 years
Weighted average discount rate - finance leases	5.90%	5.30%	3.90%
Weighted average discount rate - operating leases	5.90%	5.80%	3.40%