Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]
Effective tax rate (percent)	33.90%	29.00%	31.10%	29.10%
Statutory rate (percent)	35.00%	35.00%
Unrecognized tax benefits, interest and penalties accrued	$ 1.2		$ 1.2
Unrecognized tax benefits	$ 11.0		$ 11.0