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Segments (Details) $ in Millions	3 Months Ended
Segments (Details) $ in Millions	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Total Revenue	$ 2,650	$ 2,740
Number of strategic business units \| segment	4
Number of reportable segments \| segment	4
Adjusted PTC
Adjusted Pretax Contribution	$ 272	288
Reconciliation To Income From Continuing Operations Before Taxes
Unrealized derivative losses (gains)	(3)	(12)
Unrealized foreign currency transaction losses (gains)	(11)	3
Disposition/acquisition losses (gains)	(9)	778
Impairment losses	(2)	0
Extinguishment of debt losses (gains)	(8)	(171)
Pretax contribution	239	883
Net equity in earnings (losses) of affiliates	(6)	11
Less: Income (loss) from continuing operations before taxes, attributable to noncontrolling interests	109	126
Income (loss) from continuing operations before taxes and equity in earnings of affiliates	354	998
Restructuring Costs	0	3
Assets
Total Assets	33,471		$ 32,521
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	2,650	2,740
Adjusted PTC
Adjusted Pretax Contribution	272	288
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total Revenue	(12)	(18)
Adjusted PTC
Adjusted Pretax Contribution	1	(6)
US and Utilities [Member]
Assets
Total Assets	12,535		12,286
US and Utilities [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	1,019	1,027
Adjusted PTC
Adjusted Pretax Contribution	122	120
MCAC [Member]
Segment Reporting Information [Line Items]
Total Revenue	450	408
Assets
Total Assets	4,688		4,462
MCAC [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	450	408
Adjusted PTC
Adjusted Pretax Contribution	50	53
EURASIA [Member]
Segment Reporting Information [Line Items]
Total Revenue	339	419
Assets
Total Assets	4,571		4,538
EURASIA [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	339	419
Adjusted PTC
Adjusted Pretax Contribution	56	83
Corporate Other And Other Eliminations [Member]
Segment Reporting Information [Line Items]
Total Revenue	(3)	(9)
Assets
Total Assets	334		294
Corporate Other And Other Eliminations [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	9	9
Adjusted PTC
Adjusted Pretax Contribution	(72)	(98)
South America [Member]
Segment Reporting Information [Line Items]
Total Revenue	845	895
Assets
Total Assets	11,343		$ 10,941
South America [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	845	895
Adjusted PTC
Adjusted Pretax Contribution	$ 115	$ 136