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Business Segments and Geographic Areas - Revenues by country based on sales destination of the use of the products or services (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 5,685	$ 5,319	$ 4,734	$ 4,303	$ 4,259	$ 3,740	$ 3,513	$ 3,146	$ 20,041	$ 14,658	$ 12,156
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									8,297	5,449	4,104
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									3,121	2,257	2,616
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									1,319	913	656
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									1,118	721	491
Norway [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									736	689	495
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									533	430	366
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									523	465	421
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									503	397	262
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									$ 3,891	$ 3,337	$ 2,745

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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 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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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