Business Segment Information (Schedule of Selected Geographic Information) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 1,452	$ 1,425	$ 1,422	$ 1,340	$ 1,330	$ 1,278	$ 1,267	$ 1,038	$ 5,639	$ 4,913	$ 4,171
Property, plant & equipment, net	130				121				130	121
United States
Segment Reporting Information [Line Items]
Revenues									2,705	2,260	1,986
Property, plant & equipment, net	50				51				50	51
Middle East
Segment Reporting Information [Line Items]
Revenues									1,027	884	836
Europe
Segment Reporting Information [Line Items]
Revenues									1,058	989	480
Australia
Segment Reporting Information [Line Items]
Revenues									288	329	334
Canada
Segment Reporting Information [Line Items]
Revenues									39	21	224
Africa
Segment Reporting Information [Line Items]
Revenues									197	133	121
Asia
Segment Reporting Information [Line Items]
Revenues									214	190	125
United Kingdom
Segment Reporting Information [Line Items]
Property, plant & equipment, net	44				50				44	50
Other countries
Segment Reporting Information [Line Items]
Revenues									111	107	$ 65
Property, plant & equipment, net	$ 36				$ 20				$ 36	$ 20