Income Taxes - Operating Loss Carryforwards (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Earnings attributable to foreign subsidiaries considered to be permanently invested in operations	$ 101.5
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	260.5
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	313.4
US and Foreign
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	35.8
Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	35.4
Operating loss carryforwards, subject to expiration	7.4
Operating loss carryforwards, not subject to expiration	27.7
2014 to 2016 | State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, subject to expiration	3.6
2014 to 2016 | US and Foreign
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	6.8
2014 to 2016 | Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, subject to expiration	0.3
2017 to 2032 | US and Foreign
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	26.6
Indefinite | US and Foreign
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	$ 2.4