Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenue		$ 7,455	$ 7,879
Income (Loss) Before Taxes		(8,089)	509
Pretax segment operating income		776	908
Interest expense		136	147
Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue		1,311	1,459
Drilling
Segment Reporting Information [Line Items]
Revenue		2,291	2,387
Production
Segment Reporting Information [Line Items]
Revenue		2,703	2,890
Cameron
Segment Reporting Information [Line Items]
Revenue		1,254	1,259
Operating Segments
Segment Reporting Information [Line Items]
Revenue		7,455	7,879
Interest income			1
Interest expense		7	11
Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue		1,311	1,459
Income (Loss) Before Taxes		184	281
Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue		2,291	2,387
Income (Loss) Before Taxes		285	307
Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue		2,703	2,890
Income (Loss) Before Taxes		212	217
Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue		1,254	1,259
Income (Loss) Before Taxes		121	148
Eliminations & other
Segment Reporting Information [Line Items]
Revenue		(104)	(116)
Income (Loss) Before Taxes		(26)	(45)
Corporate & other	[1]	(228)	(273)
Interest income	[2]	15	10
Interest expense	[3]	(129)	$ (136)
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 ($- million in 2020; $1 million in 2019).

[3] Interest expense excludes amounts which are included in the segments’ income ($7 million in 2020; $11 million in 2019).

[4] See Note 2 – Charges and Credits.