Acquired Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets:
Finite-Lived Intangible Assets, Gross Carrying Amount	$ 989	$ 989	$ 989
Finite-Lived Intangible Assets, Accumulated Amortization	(663)	(753)	(663)
Finite-Lived Intangible Assets, Net	326	236	326
Impairment of Intangible Assets (Excluding Goodwill)	20		20
Finite-Lived Intangible Assets Increase in Amortization Expense				2
Acquired finite-lived intangible asset amortization expense		90	99	95
Total Acquired Intangible Assets
Total Intangible assets, Gross Carrying Amount	1,021	1,021	1,021
Total intangible assets, Net	358	268	358
Estimated amortization expense of acquired finite-lived intangible asset
2013		73
2014		61
2015		45
2016		28
2017		13
Thereafter		16
Finite-Lived Intangible Assets, Net	326	236	326
Vyvx Trade Name
Indefinite-Lived Intangible Assets:
Indefinite-Lived Intangible Assets, Net	32	32	32
Customer Contracts and Relationships
Finite-Lived Intangible Assets:
Finite-Lived Intangible Assets, Gross Carrying Amount	776	776	776
Finite-Lived Intangible Assets, Accumulated Amortization	(571)	(633)	(571)
Finite-Lived Intangible Assets, Net	205	143	205
Acquired finite-lived intangible assets, amortization period (in years)		2 years 11 months
Estimated amortization expense of acquired finite-lived intangible asset
Finite-Lived Intangible Assets, Net	205	143	205
Trademarks
Finite-Lived Intangible Assets:
Finite-Lived Intangible Assets, Gross Carrying Amount	55	55	55
Finite-Lived Intangible Assets, Accumulated Amortization	(3)	(17)	(3)
Finite-Lived Intangible Assets, Net	52	38	52
Acquired finite-lived intangible assets, amortization period (in years)		2 years 10 months
Estimated amortization expense of acquired finite-lived intangible asset
Finite-Lived Intangible Assets, Net	52	38	52
Patents and Developed Technology
Finite-Lived Intangible Assets:
Finite-Lived Intangible Assets, Gross Carrying Amount	158	158	158
Finite-Lived Intangible Assets, Accumulated Amortization	(89)	(103)	(89)
Finite-Lived Intangible Assets, Net	69	55	69
Acquired finite-lived intangible assets, amortization period (in years)		4 years
Estimated amortization expense of acquired finite-lived intangible asset
Finite-Lived Intangible Assets, Net	$ 69	$ 55	$ 69