Investments in Affiliated Companies (Future Lease Receipts) (Details 7) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
2013	$ 923.4	[1]
2014	740.3	[1]
2015	584.1	[1]
2016	464.7	[1]
2017	370.0	[1]
Years thereafter	770.4	[1]
Total future receipts from leases	3,852.9	[1]
RRPF Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
2013	303.5
2014	271.1
2015	239.7
2016	218.1
2017	167.8
Years thereafter	428.5
Total future receipts from leases	1,628.7
RRPF Joint Ventures [Member] | Rolls-Royce [Member]
Schedule of Equity Method Investments [Line Items]
2013	144.6
2014	129.3
2015	109.7
2016	102.4
2017	97.1
Years thereafter	212.3
Total future receipts from leases	795.4
RRPF Joint Ventures [Member] | Third Parties [Member]
Schedule of Equity Method Investments [Line Items]
2013	158.9
2014	141.8
2015	130.0
2016	115.7
2017	70.7
Years thereafter	216.2
Total future receipts from leases	$ 833.3

[1] (1) The future contractual receipts due under our full-service operating leases include executory costs such as maintenance, car taxes, and insurance.