Assets Held for Sale Asset Held For Sale (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Long Lived Assets Held-for-sale [Line Items]
Asset Impairment Charges	$ 0.0	$ 0.0
Assets Held-for-sale, Long Lived, Fair Value Disclosure	72.8		$ 89.5
Portfolio Management [Member]
Long Lived Assets Held-for-sale [Line Items]
Asset Impairment Charges	0.0	0.0
Assets Held-for-sale, Long Lived, Fair Value Disclosure	45.6		45.6
Rail North America [Member]
Long Lived Assets Held-for-sale [Line Items]
Asset Impairment Charges	0.0	$ 0.0
Assets Held-for-sale, Long Lived, Fair Value Disclosure	$ 27.2		$ 43.9