Other Assets and Other Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Components of Other Assets reported on the consolidated balance sheets
Inventory	$ 71.8	$ 74.0
Prepaid Supplies	18.4	14.3
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Gross	3.5	2.0
Assets Held-for-sale, Long Lived, Fair Value Disclosure	0.4	0.8
Prepaid items	20.7	14.0
Office furniture, fixtures and other equipment, net of accumulated depreciation	26.8	28.5
Utilization asset	26.5	24.1
Derivative asset	0.0	0.5
Other	135.0	128.4
Total	$ 303.1	$ 286.6