Business Segment and Geographic Information (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2020		Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019
Segment Reporting [Abstract]
Impairments and other charges	$ 133,000,000	[1]	$ 0	$ 3,353,000,000	[1]	$ 308,000,000	[1]

[1] For the three months ended September 30, 2020, amount includes approximately $90 million attributable to Completion and Production, $40 million attributable to Drilling and Evaluation, and $3 million attributable to Corporate and other. For the nine months ended September 30, 2020, amount includes $2.1 billion attributable to Completion and Production, $1.2 billion attributable to Drilling and Evaluation, and $44 million attributable to Corporate and other. For the nine months ended September 30, 2019, amount includes $127 million attributable to Completion and Production, $153 million attributable to Drilling and Evaluation, and $28 million attributable to Corporate and other. See Note 2 for further discussion on these impairments and other charges. There were no impairments and other charges recorded during the three months ended September 30, 2019.