Investments in Affiliated Companies (Share of Affiliate Earnings) (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	$ 108.3	$ 98.1	$ 45.9
Provision for Income Taxes, Equity Method Investment	(25.5)	(25.7)	(12.3)
Share of Affiliates' Earnings	82.8	72.4	33.6
Rail North America [Member]
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	0.0	(0.6)	0.5
Rail International [Member]
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	0.0	0.0	0.0
Portfolio Management [Member]
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	$ 108.3	$ 98.7	$ 45.4