Revenues - Major Product Line (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Operating Leases, Income Statement, Lease Revenue	$ 28	$ 57
Disaggregation of Revenue [Line Items]
Revenue	832	1,215
Western Hemisphere
Disaggregation of Revenue [Line Items]
Revenue	390	588
Western Hemisphere | Production and Completions [Member]
Disaggregation of Revenue [Line Items]
Revenue	225	297
Western Hemisphere | Drilling Evaluation and Intervention [Member]
Disaggregation of Revenue [Line Items]
Revenue	165	291
Eastern Hemisphere
Disaggregation of Revenue [Line Items]
Revenue	442	627
Eastern Hemisphere | Production and Completions [Member]
Disaggregation of Revenue [Line Items]
Revenue	198	302
Eastern Hemisphere | Drilling Evaluation and Intervention [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 244	$ 325