Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Indefinite-Lived Intangible Assets

Indefinite-Lived Intangible Assets

	December 31, 2012		Net Additions		March 31, 2013
			(in millions)
FCC licenses	$	20,268	$	45	$	20,313
Trademarks	409		—		409
Goodwill	359		—		359
	$	21,036	$	45	$	21,081

Intangible Assets Subject to Amortization

		March 31, 2013							December 31, 2012
	Useful Lives	Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Gross Carrying Value		Accumulated Amortization			Net Carrying Value
							(in millions)
Customer relationships	4 years	$	234	$	(233	)	$	1	$	234	$	(230	)	$	4
Other intangible assets
Trademarks	10 to 37 years	1,168		(705		)	463		1,168		(681		)	487
Reacquired rights	9 to 14 years	1,571		(818		)	753		1,571		(785		)	786
Other	9 to 10 years	141		(87		)	54		138		(80		)	58
Total other intangible assets		2,880		(1,610		)	1,270		2,877		(1,546		)	1,331
Total definite-lived intangible assets		$	3,114	$	(1,843	)	$	1,271	$	3,111	$	(1,776	)	$	1,335