Intangible Assets (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 Year Country	Sep. 30, 2010
Intangible Assets - Additional Information
Amortization expense on intangible assets excluding goodwill	$ 81	$ 46	$ 245	$ 109
Weighted average amortization period for all intangible assets (years)			21
Future Amortization expense charged to income, remainder of 2011			81
Estimated amortization charged to income, 2012			303
Estimated amortization charged to income, 2013			295
Estimated amortization charged to income, 2014			286
Estimated amortization charged to income, 2015			265
Estimated amortization charged to income, 2016			$ 255