Segments (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) segment	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Total Revenue	$ 2,483	$ 2,537	$ 5,133	$ 5,277
Number of strategic business units | segment			4
Number of reportable segments | segment			4
Adjusted PTC
Adjusted Pretax Contribution	240	255	$ 512	543
Reconciliation To Income From Continuing Operations Before Taxes
Unrealized derivative losses (gains)	(6)	24	(9)	12
Unrealized foreign currency transaction losses (gains)	(7)	(52)	(18)	(49)
Disposition/acquisition losses (gains)	(5)	61	(14)	839
Impairment losses	(121)	(92)	(123)	(92)
Extinguishment of debt losses (gains)	(49)	(7)	(57)	(178)
Pretax contribution	52	189	291	1,072
Net equity in earnings (losses) of affiliates	5	14	(1)	25
Less: Income (loss) from continuing operations before taxes, attributable to noncontrolling interests	71	167	180	293
Income (loss) from continuing operations before taxes and equity in earnings of affiliates	118	342	472	1,340
Restructuring Costs	0	0	0	3
Assets
Total Assets	33,238		33,238		$ 32,521
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total Revenue	(17)	(7)	(29)	(25)
Adjusted PTC
Adjusted Pretax Contribution	(2)	(3)	(1)	(9)
US and Utilities [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	976	995	1,995	2,022
Adjusted PTC
Adjusted Pretax Contribution	118	76	240	196
Assets
Total Assets	12,550		12,550		12,286
South America [Member]
Segment Reporting Information [Line Items]
Total Revenue	765	846	1,610	1,741
South America [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	765	846	1,610	1,741
Adjusted PTC
Adjusted Pretax Contribution	106	117	221	253
Assets
Total Assets	11,290		11,290		10,941
MCAC [Member]
Segment Reporting Information [Line Items]
Total Revenue	478	406	928	814
MCAC [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	478	406	928	814
Adjusted PTC
Adjusted Pretax Contribution	63	81	113	134
Assets
Total Assets	4,602		4,602		4,462
EURASIA [Member]
Segment Reporting Information [Line Items]
Total Revenue	265	292	604	711
EURASIA [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	265	292	604	711
Adjusted PTC
Adjusted Pretax Contribution	39	55	95	138
Assets
Total Assets	4,341		4,341		4,538
Corporate Other And Other Eliminations [Member]
Segment Reporting Information [Line Items]
Total Revenue	(1)	(2)	(4)	(11)
Corporate Other And Other Eliminations [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	16	5	25	14
Adjusted PTC
Adjusted Pretax Contribution	(84)	$ (71)	(156)	$ (169)
Assets
Total Assets	$ 455		$ 455		$ 294