Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jul. 28, 2011 Tax Assessment Year 2007 to 2009 Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Effective tax rates (as a percent)	14.80%	35.40%	23.40%	27.20%
U.S. statutory rate (as a percent)		35.00%	35.00%	35.00%
Income Tax Expense (Benefit)			$ 6.8
Foreign tax credit carryforwards	18.7		18.7
Total tax assessment					64.5
Tax assessments related to disallowed deductions					$ 60.2