Investments in Affiliated Companies (Share of Affiliate Earnings) (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	$ 92.3	$ 21.6	$ 40.6
Provision for Income Taxes, Equity Method Investment	(16.5)	(2.0)	(8.2)
Share of Affiliates' Earnings	75.8	19.6	32.4
Rail North America [Member]
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	10.3	6.5	3.9
Rail International [Member]
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	21.1	(18.3)	0.5
Portfolio Management [Member]
Pre tax share of affiliates earnings by segment
Share of affiliates' earnings (pre-tax)	$ 60.9	$ 33.4	$ 36.2