Acquired Intangible Assets (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Finite-Lived Intangible Assets:
Finite-Lived Intangible Assets, Gross Carrying Amount	$ 883		$ 883		$ 883
Finite-Lived Intangible Assets, Accumulated Amortization	(635)		(635)		(564)
Finite-Lived Intangible Assets, Net	248		248		319
Increase in amortization expense due to reduction in useful life as a result of adverse economic conditions			3
Acquired finite-lived intangible asset amortization expense	23	24	72	70
Total Acquired Intangible Assets
Intangible assets, Gross Carrying Amount	935		935		935
Total intangible assets, Net	300		300		371
Estimated amortization expense of acquired finite-lived intangible asset
2011 (remaining three months)			22
2012			69
2013			51
2014			39
2015			28
2016			21
Thereafter			18
Total			248
Customer Contracts and Relationships
Finite-Lived Intangible Assets:
Finite-Lived Intangible Assets, Gross Carrying Amount	743		743		743
Finite-Lived Intangible Assets, Accumulated Amortization	(549)		(549)		(488)
Finite-Lived Intangible Assets, Net	194		194		255
Patents and Developed Technology
Finite-Lived Intangible Assets:
Finite-Lived Intangible Assets, Gross Carrying Amount	140		140		140
Finite-Lived Intangible Assets, Accumulated Amortization	(86)		(86)		(76)
Finite-Lived Intangible Assets, Net	54		54		64
Vyvx Trade Name
Indefinite-Lived Intangible Assets:
Indefinite-Lived Intangible Assets, Net	32		32		32
Wireless Licenses
Indefinite-Lived Intangible Assets:
Indefinite-Lived Intangible Assets, Net	$ 20		$ 20		$ 20