Income Taxes (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Jun. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
(Provision) benefit for income taxes	$ 6,641,000	$ (719,000)		$ 3,101,000	$ 142,751,000
Effective Income Tax Rate	34.40%	3.10%		(3.30%)	21.40%
Federal Statutory Income Tax Rate	35.00%	35.00%		35.00%	35.00%
Debt RepurchasesTax Gain				141,500,000
Estimated Decrease in Deferred Tax Assets	(3,100,000)			(54,700,000)
Impairment charges	0	0	801,074,000	0	801,074,000
Reduction in Unrecognized Tax Benefits Resulting from Lapse of Applicable Statute of Limitations					28,200,000
Increases in Unrecognized Tax Benefits		7,400,000
Changes in Non-Deductible Goodwill
Change in Income Tax (Provision) Benefit			(174,100,000)		(174,100,000)
Effective Income Tax Rate Adjusted for Changes in Tax Items					(26.10%)
Income Tax Reconciliation, Nondeductible Expense, Impairment Losses			457,200,000		457,200,000
Changes in Deferred Tax Liabilities
Change in Income Tax (Provision) Benefit		6,300,000			85,100,000
Effective Income Tax Rate Adjusted for Changes in Tax Items		(27.30%)			12.80%
Changes in Valuation Allowance
Change in Income Tax (Provision) Benefit	(2,800,000)	(14,100,000)		40,000,000	(60,700,000)
Effective Income Tax Rate Adjusted for Changes in Tax Items	(14.30%)	61.60%		(42.20%)	(9.10%)
Changes in Tax Planning Associated with IRC Section 108 and Other Adjustments
(Provision) benefit for income taxes		23,600,000			23,600,000
Effective Income Tax Rate Adjusted for Changes in Tax Items		(103.10%)			3.50%
Changes in Liabilities for Uncertain Tax Positions
Change in Income Tax (Provision) Benefit					$ 24,000,000
Effective Income Tax Rate Adjusted for Changes in Tax Items					3.60%
Changes in Liabilities for Uncertain Tax Positions Related to IRC Section 108 Planning and Non Business Income Audit in State of Illinois
Effective Income Tax Rate Adjusted for Changes in Tax Items		29.60%			(1.00%)