Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Effective tax rate (percent)	28.60%	31.40%	30.00%	30.30%
Statutory rate (percent)	35.00%	35.00%
Unrecognized tax benefits, interest and penalties accrued	$ 1.3		$ 1.3
Unrecognized tax benefits	$ 11.5		$ 11.5