Intangible Assets (Indefinite-Lived Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Period Start	$ 20,677
Indefinite-lived Intangible Assets, Period End	21,370
Goodwill, beginning balance	359
Goodwill Net Additions/(reductions)	9
Goodwill, ending balance	368
Total indefinite-lived intangible assets including FCC licenses, Trademarks, Goodwill, beginning balance	21,036
Indefinite lived intangible assets period increase decrease	702
Total indefinite-lived intangible assets including FCC licenses, Trademarks, Goodwill, ending balance	21,738
FCC Licenses [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Period Start	20,268
Indefinite-lived Intangible Assets, Period Increase (Decrease)	693
Indefinite-lived Intangible Assets, Period End	20,961
Trademarks [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Period Start	409
Indefinite-lived Intangible Assets, Period Increase (Decrease)	0
Indefinite-lived Intangible Assets, Period End	$ 409