Income Taxes (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Effective Income Tax Rate, Continuing Operations	1.10%	7.60%	0.90%	55.50%
Effective Tax Rate	14.50%	17.40%	14.70%	15.50%
Impact of certain receipts charges	13.40%	9.80%	13.80%	(40.00%)