Restructuring Charges (Restructuring Charges) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Restructuring Cost and Reserve [Line Items]
Severance, asset impairment and other restructuring charges	$ 2	$ 0	$ 22	$ 0
Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Severance, asset impairment and other restructuring charges		0
Restructuring Charges | Corporate, Non-Segment
Restructuring Cost and Reserve [Line Items]
Severance, asset impairment and other restructuring charges			5	0
Restructuring Charges | Drilling and Evaluation [Member] | Operating Segments
Restructuring Cost and Reserve [Line Items]
Severance, asset impairment and other restructuring charges	0	0	5	0
Restructuring Charges | Well Construction And Completion | Operating Segments
Restructuring Cost and Reserve [Line Items]
Severance, asset impairment and other restructuring charges	0	0	7	0
Restructuring Charges | Production And Intervention | Operating Segments
Restructuring Cost and Reserve [Line Items]
Severance, asset impairment and other restructuring charges	0	0	$ 5	$ 0
Restructuring Charges | Corporate and Other
Restructuring Cost and Reserve [Line Items]
Severance, asset impairment and other restructuring charges	$ 2	$ 0