Leasing Arrangements (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, plant and equipment under capital leasing arrangements
Property, plant and equipment	$ 3.7	$ 3.7
Less accumulated depreciation	(1.6)	(1.6)
Net property, plant and equipment	2.1	2.1
Liability balances under capital leasing arrangements
Capital lease obligations	1.8	2.0
Less current maturities	(1.8)	(0.2)
Long-term capital lease obligations, net		1.8
Operating leases
Rental expenses on operating leases	16.1	15.4	15.2
Future minimum operating lease payments
2014	9.1
2015	5.3
2016	4.1
2017	2.2
2018	1.8
Thereafter	9.3
Total minimum lease payments	$ 31.8