Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Deferred Tax Liabilities, Goodwill and Intangible Assets [Abstract]

Indefinite-Lived Intangible Assets

	December 31, 2010		Net Additions		December 31, 2011		Net Additions		December 31, 2012
	(in millions)
FCC licenses	$	19,927	$	117	$	20,044	$	224	$	20,268
Trademarks	409		—		409		—		409
Goodwill	359		—		359		—		359
	$	20,695	$	117	$	20,812	$	224	$	21,036

Intangible Assets Subject to Amortization

During 2012, we conducted an assessment of the recoverability of intangible assets subject to amortization and determined that no adjustment was necessary.

		December 31, 2012							December 31, 2011
	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	$	(230	)	$	4	$	341	$	(297	)	$	44
Other intangible assets
Trademarks	10 to 37 years	1,168		(681		)	487		1,169		(585		)	584
Reacquired rights	9 to 14 years	1,571		(785		)	786		1,571		(652		)	919
Other	9 to 10 years	138		(80		)	58		126		(57		)	69
Total other intangible assets		2,877		(1,546		)	1,331		2,866		(1,294		)	1,572
Total definite-lived intangible assets		$	3,111	$	(1,776	)	$	1,335	$	3,207	$	(1,591	)	$	1,616

Schedule of Intangible Assets, Estimated Amortization

	2013		2014		2015		2016		2017
	(in millions)
Estimated amortization expense	$	250	$	237	$	196	$	135	$	134