Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Tax Contingency [Line Items]
Effective tax rate	37.90%	37.80%	39.00%	40.00%
Income tax benefit related to expiration of statute of limitations for uncertain tax positions and Adjustment to Prior Yesar Estimate	$ 0.3	$ 0.6	$ 0.5	$ 0.5
Effective income tax rate reconciliation, expiration of statute of limitations for uncertain tax positions and adjustment of prior year estimate	2.00%	2.80%	1.20%	1.50%
Total gross amount of unrecognized tax benefits that would impact effective tax rate	1.7	0.9	1.7	0.9
Potential impact on total gross amount of unrecognized tax benefits due to expiration of statute of limitations	$ 1.1		$ 1.1
FCGC [Member]
Income Tax Contingency [Line Items]
Increase in effective income tax rate due to non-deductible transaction costs related to acquistion				1.10%