Revenues - Major Product Line (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 945	$ 807	$ 2,680	$ 2,843
Revenue Not from Contract with Customer, Other	34	30	97	119
Western Hemisphere
Disaggregation of Revenue [Line Items]
Revenue	441	316	1,256	1,214
Western Hemisphere | Production and Completions [Member]
Disaggregation of Revenue [Line Items]
Revenue	239	170	695	632
Western Hemisphere | Drilling Evaluation and Intervention [Member]
Disaggregation of Revenue [Line Items]
Revenue	202	146	561	582
Eastern Hemisphere
Disaggregation of Revenue [Line Items]
Revenue	504	491	1,424	1,629
Eastern Hemisphere | Production and Completions [Member]
Disaggregation of Revenue [Line Items]
Revenue	221	241	633	783
Eastern Hemisphere | Drilling Evaluation and Intervention [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 283	$ 250	$ 791	$ 846