Leases (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Minimum Future Receipts
2013, Finance Leases	$ 26.3
2014, Finance Leases	25.2
2015, Finance Leases	23.9
2016, Finance Leases	22.2
2017, Finance Leases	11.8
Years thereafter, Finance Leases	95.4
Total, Finance Leases	204.8
2013, Operating Leases	923.4	[1]
2014, Operating Leases	740.3	[1]
2015, Operating Leases	584.1	[1]
2016, Operating Leases	464.7	[1]
2017, Operating Leases	370.0	[1]
Years thereafter, Operating Leases	770.4	[1]
Total future receipts from leases	3,852.9	[1]
2013, Total	949.7
2014, Total	765.5
2015, Total	608.0
2016, Total	486.9
2017, Total	381.8
Years thereafter, Total	865.8
Total	$ 4,057.7

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