Other Assets and Other Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Components of Other Assets reported on the consolidated balance sheets
Inventory	$ 60.2	$ 52.0
Prepaid Supplies	12.7	42.0
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Gross	2.5	2.8
Assets Held-for-sale, Long Lived, Fair Value Disclosure	40.0	3.8
Prepaid pension	14.2	28.6
Office furniture, fixtures and other equipment, net of accumulated depreciation	29.5	30.2
Derivative asset	0.7	8.9
Other	111.6	96.7
Total	$ 271.4	$ 265.0