Operating Segments, Geographic Analysis and Major Customers (Details 2) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Segments, Geographical Analysis and Major Customers
Long-lived assets	$ 22,529	$ 21,319
Long-lived assets in Switzerland	8	15
U.S.
Segments, Geographical Analysis and Major Customers
Long-lived assets	6,549	5,519
Brazil
Segments, Geographical Analysis and Major Customers
Long-lived assets	2,185	2,472
India
Segments, Geographical Analysis and Major Customers
Long-lived assets	1,593	2,632
Other countries
Segments, Geographical Analysis and Major Customers
Long-lived assets	$ 12,202	$ 10,696
Threshold for long lived assets for reporting individually as a country (as a percent)	10.00%

The threshold for disclosing operating revenues or long-lived assets by individual country.

No definition available.

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- Definition

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 38

-Subparagraph b(1)

+ Details

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- Definition

Amount of long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets located in foreign countries. An entity also may provide subtotals of geographic information about groups of countries; accordingly, this element also may be used to provide the amount of such long-lived assets for a group of countries.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 38

-Subparagraph b

+ Details

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