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Business Segments and Geographic Areas (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
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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 + Details
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