Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenue		$ 5,223	$ 7,455
Income (Loss) Before Taxes		386	(8,089)
Pretax segment operating income		664	776
Interest expense		136	136
Digital Integration
Segment Reporting Information [Line Items]
Revenue		773	885
Reservoir Performance
Segment Reporting Information [Line Items]
Revenue		1,002	1,969
Production Systems
Segment Reporting Information [Line Items]
Revenue		1,590	1,912
Operating Segments
Segment Reporting Information [Line Items]
Revenue		5,223	7,455
Interest income		1
Interest expense		4	7
Operating Segments | Digital Integration
Segment Reporting Information [Line Items]
Revenue		773	885
Income (Loss) Before Taxes		247	151
Operating Segments | Reservoir Performance
Segment Reporting Information [Line Items]
Revenue		1,002	1,969
Income (Loss) Before Taxes		102	134
Operating Segments | Well Construction
Segment Reporting Information [Line Items]
Revenue		1,935	2,815
Income (Loss) Before Taxes		209	331
Operating Segments | Production Systems
Segment Reporting Information [Line Items]
Revenue		1,590	1,912
Income (Loss) Before Taxes		138	191
Eliminations & other
Segment Reporting Information [Line Items]
Revenue		(77)	(126)
Income (Loss) Before Taxes		(32)	(31)
Corporate & other	[1]	(150)	(228)
Interest income	[2]	4	15
Interest expense	[3]	$ (132)	(129)
Charges and credits	[4]		$ (8,523)

[1] Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items.

[2] Interest income excludes amounts which are included in the segments’ income ($1 million in 2021; $- million in 2020).

[3] Interest expense excludes amounts which are included in the segments’ income ($4 million in 2021; $7 million in 2020).

[4] See Note 2 – Charges and Credits.