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Business Segments and Geographic Areas (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues by country based on sales destination of the use of the products or services
Revenue	$ 4,259	$ 3,740	$ 3,513	$ 3,146	$ 3,172	$ 3,011	$ 2,941	$ 3,032	$ 14,658	$ 12,156	$ 12,712
United States [Member]
Revenues by country based on sales destination of the use of the products or services
Revenue									5,449	4,104	3,444
South Korea [Member]
Revenues by country based on sales destination of the use of the products or services
Revenue									2,257	2,616	2,830
Canada [Member]
Revenues by country based on sales destination of the use of the products or services
Revenue									913	656	550
Singapore [Member]
Revenues by country based on sales destination of the use of the products or services
Revenue									721	491	801
Norway [Member]
Revenues by country based on sales destination of the use of the products or services
Revenue									689	495	629
United Kingdom [Member]
Revenues by country based on sales destination of the use of the products or services
Revenue									465	421	578
Other Countries [Member]
Revenues by country based on sales destination of the use of the products or services
Revenue									$ 4,164	$ 3,373	$ 3,880

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 1



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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