Segment Information - Revenue by Geographic Area (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Revenue	$ 5,356	$ 8,269	$ 12,811	$ 16,149
Operating Segments
Segment Reporting Information [Line Items]
Revenue	5,356	8,269	12,811	16,149
Operating Segments \| North America
Segment Reporting Information [Line Items]
Revenue	1,183	2,801	3,463	5,539
Operating Segments \| Latin America
Segment Reporting Information [Line Items]
Revenue	543	1,115	1,488	2,107
Operating Segments \| Europe/CIS/Africa
Segment Reporting Information [Line Items]
Revenue	1,449	1,896	3,200	3,602
Operating Segments \| Middle East & Asia
Segment Reporting Information [Line Items]
Revenue	2,146	2,452	4,572	4,790
Eliminations & other
Segment Reporting Information [Line Items]
Revenue	$ 35	$ 5	$ 88	$ 111

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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+ Details