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Business Segments and Geographic Areas - Revenues by Country Based on Sales Destination of Products or Services (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 2,398	$ 2,154	$ 2,106	$ 1,795	$ 1,969	$ 1,835	$ 1,759	$ 1,741	$ 8,453	$ 7,304	$ 7,251
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									3,480	2,760	1,961
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									415	498	242
Saudi Arabia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									444	310	258
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									231	298	557
Norway [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									368	295	339
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									302	286	217
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									309	279	299
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									169	261	495
United Arab Emirates [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									248	223	334
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									321	188	340
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									$ 2,166	$ 1,906	$ 2,209

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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+ References

No definition available.

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