Investments in Affiliated Companies (Investments and Distributions) (Details 3) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($) Vessel
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Net Sales Proceeds	$ 24.7	$ 19.4	$ 55.6
Number of vessels received | Vessel			5
Payments to Acquire Equity Method Investments	15.5	15.3	$ 101.3
Proceeds from Equity Method Investment, Dividends or Distributions	37.3	54.2	47.0
Rail North America [Member]
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	0.0	0.0	0.0
Proceeds from Equity Method Investment, Dividends or Distributions	5.1	20.0	0.0
Rail International [Member]
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	0.0	0.0	0.0
Proceeds from Equity Method Investment, Dividends or Distributions	0.0	0.0	0.0
Portfolio Management [Member]
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	15.5	15.3	101.3
Proceeds from Equity Method Investment, Dividends or Distributions	$ 32.2	$ 34.2	$ 47.0