Segment Information - Summary of North America and International Revenue Disaggregated by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenue	$ 23,601	$ 32,917	$ 32,815
Operating Segments
Segment Reporting Information [Line Items]
Revenue	23,601	32,917	32,815
Eliminations & other
Segment Reporting Information [Line Items]
Revenue	121	229	377
North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	5,478	10,446	11,730
International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	18,002	22,242	20,708
Digital Integration
Segment Reporting Information [Line Items]
Revenue	3,076	4,145	3,820
Digital Integration | Operating Segments
Segment Reporting Information [Line Items]
Revenue	3,076	4,145	3,820
Digital Integration | Eliminations & other
Segment Reporting Information [Line Items]
Revenue	7	8	140
Digital Integration | North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	573	865	786
Digital Integration | International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	2,496	3,272	2,894
Reservoir Performance
Segment Reporting Information [Line Items]
Revenue	5,602	9,299	10,050
Reservoir Performance | Operating Segments
Segment Reporting Information [Line Items]
Revenue	5,602	9,299	10,050
Reservoir Performance | Eliminations & other
Segment Reporting Information [Line Items]
Revenue	12	11	9
Reservoir Performance | North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,547	3,779	4,975
Reservoir Performance | International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	4,043	5,509	5,066
Well Construction
Segment Reporting Information [Line Items]
Revenue	8,605	11,880	11,310
Well Construction | Operating Segments
Segment Reporting Information [Line Items]
Revenue	8,605	11,880	11,310
Well Construction | Eliminations & other
Segment Reporting Information [Line Items]
Revenue	196	257	316
Well Construction | North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,453	2,814	2,911
Well Construction | International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	6,956	8,809	8,083
Production Systems
Segment Reporting Information [Line Items]
Revenue	6,650	8,167	8,168
Production Systems | Operating Segments
Segment Reporting Information [Line Items]
Revenue	6,650	8,167	8,168
Production Systems | Eliminations & other
Segment Reporting Information [Line Items]
Revenue	27	55	63
Production Systems | North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,921	3,053	3,139
Production Systems | International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	4,702	5,059	4,966
Eliminations & Other
Segment Reporting Information [Line Items]
Revenue	(332)	(574)	(533)
Eliminations & Other | Eliminations & other
Segment Reporting Information [Line Items]
Revenue	(121)	(102)	(151)
Eliminations & Other | North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	(16)	(65)	(81)
Eliminations & Other | International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	$ (195)	$ (407)	$ (301)