Revenues - Major Product Line (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue from Contract with Customer [Abstract]
Operating Leases, Income Statement, Lease Revenue	$ 35	$ 32	$ 63	$ 89
Disaggregation of Revenue [Line Items]
Revenue	903	821	1,735	2,036
Western Hemisphere
Disaggregation of Revenue [Line Items]
Revenue	425	310	815	898
Western Hemisphere | Production and Completions [Member]
Disaggregation of Revenue [Line Items]
Revenue	231	165	456	462
Western Hemisphere | Drilling Evaluation and Intervention [Member]
Disaggregation of Revenue [Line Items]
Revenue	194	145	359	436
Eastern Hemisphere
Disaggregation of Revenue [Line Items]
Revenue	478	511	920	1,138
Eastern Hemisphere | Production and Completions [Member]
Disaggregation of Revenue [Line Items]
Revenue	214	240	412	542
Eastern Hemisphere | Drilling Evaluation and Intervention [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 264	$ 271	$ 508	$ 596