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Business Segments and Geographic Areas - Revenues by Country Based on Sales Destination of Use of Products or Services (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 2,722	$ 3,306	$ 3,909	$ 4,820	$ 5,709	$ 5,587	$ 5,255	$ 4,889	$ 14,757	$ 21,440	$ 19,221
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									3,640	6,097	5,140
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									1,835	3,472	3,219
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									1,623	1,905	1,007
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									1,035	1,157	1,850
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									634	715	705
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									605	1,299	811
Norway [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									555	881	1,102
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									365	645	625
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									$ 4,465	$ 5,269	$ 4,762

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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=26872669&loc=d3e20235-122688

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