Supplemental Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Supplemental disclosure of cash flow information:
Interest paid			$ 12.2	$ 14.4
Income taxes paid	1.6	0.5	2.7	1.8
Supplemental disclosure of non-cash transactions:
Stock repurchases not yet settled (accrued in accounts payable)			0.2	0
Non-cash capital expenditures			1.8	3.5
Capital leases acquired			$ 0	$ 0.2