Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012 Rate	Jun. 30, 2011 Rate	Jun. 30, 2012 Rate	Jun. 30, 2011 Rate	Dec. 31, 2011
Income Taxes [Line Items]
Unrecognized Tax Benefits	$ 49,900,000		$ 49,900,000		$ 48,100,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	28,900,000		28,900,000		26,500,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	1,500,000		1,500,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	15,000,000		15,000,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued					21,400,000
Unrecognized Tax Benefits, Income Tax Penalties Accrued					10,000,000
Unrecognized Tax Benefits, Additional Interest Accrued			2,100,000
Unrecognized Tax Benefits, Additional Penalties Accrued			700,000
Income Tax Sharing Agreement With Parent - Maximum Amount	650,000,000		650,000,000
Intercompany Taxes Payable	$ 478,161,000		$ 478,161,000		$ 300,306,000
Effective Income Tax Rate, Continuing Operations	37.10%	33.50%	37.50%	36.90%