Revenues - Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total Product and Service Revenue before Rental Revenues	$ 1,215		$ 1,346
Rental Revenues	57		78
Total Revenues	1,215	$ 1,215	1,346	$ 1,346
Western Hemisphere
Disaggregation of Revenue [Line Items]
Total Product and Service Revenue before Rental Revenues	588	588	726	726
Western Hemisphere | North America
Disaggregation of Revenue [Line Items]
Total Product and Service Revenue before Rental Revenues		341		456
Western Hemisphere | Latin America
Disaggregation of Revenue [Line Items]
Total Product and Service Revenue before Rental Revenues		247		270
Western Hemisphere | United States
Disaggregation of Revenue [Line Items]
Total Product and Service Revenue before Rental Revenues	274		373
Eastern Hemisphere
Disaggregation of Revenue [Line Items]
Total Product and Service Revenue before Rental Revenues	$ 627	627	$ 620	620
Eastern Hemisphere | Middle East & North Africa and Asia
Disaggregation of Revenue [Line Items]
Total Product and Service Revenue before Rental Revenues		403		390
Eastern Hemisphere | Europe/Sub-Sahara Africa/Russia
Disaggregation of Revenue [Line Items]
Total Product and Service Revenue before Rental Revenues		$ 224		$ 230