Segments (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) segment	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Total Revenue	$ 2,625	$ 2,837	$ 7,758	$ 8,114
Number of strategic business units | segment			4
Number of reportable segments | segment			4
Adjusted PTC
Adjusted Pretax Contribution	426	327	$ 938	870
Reconciliation To Income From Continuing Operations Before Taxes
Unrealized derivative losses (gains)	(69)	(16)	(78)	(4)
Unrealized foreign currency transaction losses (gains)	(31)	7	(49)	(42)
Disposition/acquisition losses (gains)	17	(17)	3	822
Impairment losses	(1)	(80)	(124)	(172)
Extinguishment of debt losses (gains)	(38)	1	(95)	(177)
Pretax contribution	304	222	595	1,294
Net equity in earnings of affiliates	4	6	3	31
Less: Income (loss) from continuing operations before taxes, attributable to noncontrolling interests	124	116	304	409
Income (loss) from continuing operations before taxes and equity in earnings of affiliates	424	332	896	1,672
Restructuring Costs	0	0	0	3
Assets
Total Assets	33,423		33,423		$ 32,521
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total Revenue	(14)	(9)	(43)	(34)
Adjusted PTC
Adjusted Pretax Contribution	(9)	5	(10)	(4)
US and Utilities [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	1,130	1,230	3,125	3,252
Adjusted PTC
Adjusted Pretax Contribution	187	167	427	363
Assets
Total Assets	12,963		12,963		12,286
South America [Member]
Segment Reporting Information [Line Items]
Total Revenue	828	923	2,438	2,664
South America [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	828	923	2,438	2,664
Adjusted PTC
Adjusted Pretax Contribution	139	128	360	381
Assets
Total Assets	11,225		11,225		10,941
MCAC [Member]
Segment Reporting Information [Line Items]
Total Revenue	470	462	1,398	1,276
MCAC [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	470	462	1,398	1,276
Adjusted PTC
Adjusted Pretax Contribution	185	81	298	215
Assets
Total Assets	4,886		4,886		4,462
EURASIA [Member]
Segment Reporting Information [Line Items]
Total Revenue	197	224	801	935
EURASIA [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	197	224	801	935
Adjusted PTC
Adjusted Pretax Contribution	19	37	114	175
Assets
Total Assets	3,984		3,984		4,538
Corporate Other And Other Eliminations [Member]
Segment Reporting Information [Line Items]
Total Revenue	0	(2)	(4)	(13)
Corporate Other And Other Eliminations [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	14	7	39	21
Adjusted PTC
Adjusted Pretax Contribution	(95)	$ (91)	(251)	$ (260)
Assets
Total Assets	$ 365		$ 365		$ 294