Investments in Affiliated Companies (Investments and Distributions) (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Net Sales Proceeds	$ 1.0	$ 24.7	$ 19.4
Payments to Acquire Equity Method Investments	25.0	15.5	15.3
Proceeds from Equity Method Investment, Dividends or Distributions	36.7	37.3	54.2
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	1.5	5.1	20.0
Portfolio Management [Member]
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	25.0	15.5	15.3
Proceeds from Equity Method Investment, Dividends or Distributions	$ 35.2	$ 32.2	$ 34.2