Investments in Affiliated Companies (Future Lease Receipts) (Details 7) $ in Millions	Dec. 31, 2018 USD ($)
Schedule of Equity Method Investments [Line Items]
2016	$ 935.1
2017	732.1
2018	548.1
2019	383.1
2020	277.5
Years thereafter	366.4
Total future receipts from leases	3,242.3	[1]
RRPF Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
2016	443.1
2017	412.2
2018	377.7
2019	351.3
2020	315.5
Years thereafter	1,001.2
Total future receipts from leases	2,901.0
RRPF Joint Ventures [Member] | Rolls-Royce [Member]
Schedule of Equity Method Investments [Line Items]
2016	270.1
2017	258.7
2018	246.4
2019	235.4
2020	213.9
Years thereafter	689.1
Total future receipts from leases	1,913.6
RRPF Joint Ventures [Member] | Third Parties [Member]
Schedule of Equity Method Investments [Line Items]
2016	173.0
2017	153.5
2018	131.3
2019	115.9
2020	101.6
Years thereafter	312.1
Total future receipts from leases	$ 987.4

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