Income Taxes (Narrative) (Details) (USD $)	3 Months Ended
Mar. 31, 2012 years	Mar. 31, 2011	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance	$ 348,000,000	$ 196,000,000
Deferred Tax Assets, Valuation Allowance	4,200,000,000		3,900,000,000
Income tax expense	37,000,000	37,000,000
FCC License Amortization Period for Tax Purposes In Years	15
Unrecognized tax benefit	$ 224,000,000		$ 225,000,000

The sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.

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