Intangible Assets (Indefinite-Lived Intangible Assets) (Details) (USD $)	3 Months Ended
	Mar. 31, 2013
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Period Start	$ 20,677,000,000
Indefinite-lived Intangible Assets, Period End	20,722,000,000
Goodwill, beginning balance	359,000,000
Goodwill Net Additions/(reductions)	0
Goodwill, ending balance	359,000,000
Total indefinite-lived intangible assets including FCC licenses, Trademarks, Goodwill, beginning balance	21,036,000,000
Indefinite lived intangible assets period increase decrease	45,000,000
Total indefinite-lived intangible assets including FCC licenses, Trademarks, Goodwill, ending balance	21,081,000,000
FCC Licenses [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Period Start	20,268,000,000
Indefinite-lived Intangible Assets, Period Increase (Decrease)	45,000,000
Indefinite-lived Intangible Assets, Period End	20,313,000,000
Trademarks [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Period Start	409,000,000
Indefinite-lived Intangible Assets, Period Increase (Decrease)	0
Indefinite-lived Intangible Assets, Period End	$ 409,000,000