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Income Taxes (Narrative) (Details) (USD $)	3 Months Ended
Income Taxes (Narrative) (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance	$ 265,000,000	$ 348,000,000
Deferred Tax Assets, Valuation Allowance	5,900,000,000		5,700,000,000
Income tax expense	38,000,000	37,000,000
FCC License Amortization Period for Tax Purposes In Years	15 years
Unrecognized tax benefit	$ 180,000,000		$ 171,000,000

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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- Definition

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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