Asset Impairments and Assets Held for Sale Asset Held For Sale (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Long Lived Assets Held-for-sale [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	$ 40.0	$ 3.8
Portfolio Management [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	25.1
Rail North America [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	1.2	$ 3.8
Rail International [Member]
Long Lived Assets Held-for-sale [Line Items]
Assets Held-for-sale, Long Lived, Fair Value Disclosure	$ 13.7