Income Taxes - Net Operating Losses (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Net Operating Losses [Line Items]
2014-2018	$ 4.2
2019-2023	5.5
2024 and thereafter	10.7
Unlimited	6.4
Tax benefit of net operating loss carryforwards before valuation allowances	26.8	63.5
Federal [Member]
Net Operating Losses [Line Items]
2014-2018	0
2019-2023	0
2024 and thereafter	0
Unlimited	0
Tax benefit of net operating loss carryforwards before valuation allowances	0
State [Member]
Net Operating Losses [Line Items]
2014-2018	0.3
2019-2023	0.2
2024 and thereafter	10.3
Unlimited	0
Tax benefit of net operating loss carryforwards before valuation allowances	10.8
Foreign [Member]
Net Operating Losses [Line Items]
2014-2018	3.9
2019-2023	5.3
2024 and thereafter	0.4
Unlimited	6.4
Tax benefit of net operating loss carryforwards before valuation allowances	$ 16.0