Acquired Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Finite-Lived Intangible Assets:
Finite-Lived Intangible Assets, Gross Carrying Amount	$ 988		$ 989
Finite-Lived Intangible Assets, Accumulated Amortization	(771)		(753)
Finite-Lived Intangible Assets, Net	217		236
Acquired finite-lived intangible asset amortization expense	18	25
Indefinite-Lived Intangible Assets:
Total identifiable acquisition-related intangible assets, Gross Carrying Amount	1,020		1,021
Total identifiable acquisition-related intangible assets, Net	249		268
Estimated amortization expense of finite-lived acquisition-related intangible assets
2013 (remaining nine months)	54
2014	61
2015	45
2016	28
2017	13
2018	13
Thereafter	3
Finite-Lived Intangible Assets, Net	217		236
Vyvx Trade Name
Indefinite-Lived Intangible Assets:
Indefinite-Lived Intangible Assets	32		32
Customer Contracts and Relationships
Finite-Lived Intangible Assets:
Finite-Lived Intangible Assets, Gross Carrying Amount	775		776
Finite-Lived Intangible Assets, Accumulated Amortization	(644)		(633)
Finite-Lived Intangible Assets, Net	131		143
Acquired finite-lived intangible assets weighted average remaining useful lives (in years)	3 years
Estimated amortization expense of finite-lived acquisition-related intangible assets
Finite-Lived Intangible Assets, Net	131		143
Trademarks
Finite-Lived Intangible Assets:
Finite-Lived Intangible Assets, Gross Carrying Amount	55		55
Finite-Lived Intangible Assets, Accumulated Amortization	(21)		(17)
Finite-Lived Intangible Assets, Net	34		38
Acquired finite-lived intangible assets weighted average remaining useful lives (in years)	2 years 6 months
Estimated amortization expense of finite-lived acquisition-related intangible assets
Finite-Lived Intangible Assets, Net	34		38
Patents and Developed Technology
Finite-Lived Intangible Assets:
Finite-Lived Intangible Assets, Gross Carrying Amount	158		158
Finite-Lived Intangible Assets, Accumulated Amortization	(106)		(103)
Finite-Lived Intangible Assets, Net	52		55
Acquired finite-lived intangible assets weighted average remaining useful lives (in years)	3 years 8 months
Estimated amortization expense of finite-lived acquisition-related intangible assets
Finite-Lived Intangible Assets, Net	$ 52		$ 55