Business Segment and Geographic Information (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021		Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020
Segment Reporting [Abstract]
Impairments and other charges	$ 0	[1]	$ 2,147	$ 0	[1]	$ 3,220	[1]

[1] For the three and six months ended June 30, 2020, amount includes approximately $1.4 billion and $2.1 billion attributable to Completion and Production, $770 million and $1.0 billion attributable to Drilling and Evaluation, and $25 million and $41 million attributable to Corporate and other, respectively.