Income Taxes - Operating Loss Carryforwards (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012
Operating Loss Carryforwards [Line Items]
US tax liability associated with permanent repatriations of unremitted earnings	$ 4.0
Earnings attributable to foreign subsidiaries considered to be permanently invested in operations		92.8
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		182.7
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		263.8
Federal and State
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount		39.2
Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		46.1
Operating loss carryforwards, subject to expiration		12.9
Operating loss carryforwards, not subject to expiration		29.1
2013 to 2015 | State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, subject to expiration		2.3
2013 to 2015 | Federal and State
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount		5.9
2013 to 2015 | Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, subject to expiration		$ 4.1