Commercial Commitments (Details) - USD ($) $ in Millions		Jun. 30, 2017	Dec. 31, 2016
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value		$ 2.5	$ 3.0
Total commercial commitments	[1]	18.4	23.9
Lease payment guarantees [Member]
Guarantor Obligations [Line Items]
Total commercial commitments		9.6	15.0
Standby letters of credit [Member]
Guarantor Obligations [Line Items]
Total commercial commitments		$ 8.8	$ 8.9

[1] (1) The carrying value of liabilities on the balance sheet for commercial commitments was $2.5 million at June 30, 2017 and $3.0 million at December 31, 2016. The expirations of these commitments range from 2017 to 2023. We are not aware of any event that would require us to satisfy any of our commitments.