Commercial Commitments (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Apr. 29, 2013		Dec. 31, 2012
Guarantor Obligations [Line Items]
Total commercial commitments	$ 59.0	[1]			$ 104.5	[1]
Amount of liability included in recorded value of the company's commitment	5.9				6.4
Affiliate guarantees [Member]
Guarantor Obligations [Line Items]
Total commercial commitments	0	[2]	42.0	[2]	42.0	[2]
Asset residual value guarantees [Member]
Guarantor Obligations [Line Items]
Total commercial commitments	5.1				11.2
Lease payment guarantees [Member]
Guarantor Obligations [Line Items]
Total commercial commitments	37.9				41.0
Performance bonds [Member]
Guarantor Obligations [Line Items]
Total commercial commitments	0.6				0.6
Standby letters of credit [Member]
Guarantor Obligations [Line Items]
Total commercial commitments	$ 15.4				$ 9.7

[1] The carrying values of liabilities on the balance sheet for our commercial commitments were $5.9 million at June 30, 2013 and $6.4 million at December 31, 2012. The expiration dates for our commitments range from 2014–2022.

[2] No amount is provided for one of our guarantees that does not state a maximum potential future payment and for which we believe the likelihood that we will be required to perform under the guarantee is remote. In April 2013, $42.0 million of our affiliate guarantees were terminated.