Long-Lived Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended					9 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Sep. 30, 2012	Sep. 30, 2011
Property, Plant and Equipment [Line Items]
Asset impairments	$ 0.3	$ 13.0	$ 0	$ 0.5	$ 1.1	$ 13.3	$ 1.6
Assets, Fair Value Disclosure	2.8					2.8
Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Asset impairments						11.8
Assets, Total [Member]
Property, Plant and Equipment [Line Items]
Asset impairments						13.3
Fair Value, Measurements, Nonrecurring [Member]
Property, Plant and Equipment [Line Items]
Impairment of Intangible Assets, Finite-lived						1.5
Property, Plant, and Equipment, Fair Value Disclosure		$ 2.4