Segments (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Total Revenue	$ 3,036	$ 2,545	$ 8,371	$ 7,100
Number of strategic business units | segment			4
Number of reportable segments | segment			4
Adjusted PTC
Adjusted Pretax Contribution	428	331	$ 978	819
Reconciliation To Income From Continuing Operations Before Taxes
Unrealized derivative losses (gains)	53	(26)	(24)	(24)
Unrealized foreign currency transaction losses (gains)	(11)	4	(5)	7
Disposition/acquisition losses (gains)	33	(100)	277	(130)
Impairment losses	(18)	(657)	(1,121)	(878)
Extinguishment of debt losses (gains)	(27)	(55)	(51)	(103)
Gain (Loss) on Contract Termination	(36)	(72)	(256)	(72)
Pretax contribution	494	(431)	310	(237)
Net equity in earnings (losses) of affiliates	25	(112)	(15)	(106)
Less: Income (loss) from continuing operations before taxes, attributable to noncontrolling interests	117	(197)	140	40
Income (loss) from continuing operations before taxes and equity in earnings of affiliates	586	(516)	465	(91)
Assets
Total Assets	35,030		35,030		$ 34,603
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total Revenue	(24)	(52)	(91)	(198)
Adjusted PTC
Adjusted Pretax Contribution	12	4	37	11
US and Utilities [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	1,327	1,061	3,248	2,945
Adjusted PTC
Adjusted Pretax Contribution	254	185	426	313
Assets
Total Assets	15,277		15,277		14,464
MCAC [Member]
Segment Reporting Information [Line Items]
Total Revenue	559	442	1,584	1,255
MCAC [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	559	442	1,584	1,255
Adjusted PTC
Adjusted Pretax Contribution	81	57	213	201
Assets
Total Assets	4,581		4,581		4,847
EURASIA [Member]
Segment Reporting Information [Line Items]
Total Revenue	257	195	804	634
EURASIA [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	257	195	804	634
Adjusted PTC
Adjusted Pretax Contribution	45	40	144	133
Assets
Total Assets	3,481		3,481		3,621
Corporate Other And Other Eliminations [Member]
Segment Reporting Information [Line Items]
Total Revenue	(3)	(3)	(9)	(7)
Corporate Other And Other Eliminations [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	21	49	82	191
Adjusted PTC
Adjusted Pretax Contribution	(47)	(77)	(109)	(220)
Assets
Total Assets	749		749		342
South American SBU
Segment Reporting Information [Line Items]
Total Revenue	896	850	2,744	2,273
South American SBU | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	896	850	2,744	2,273
Adjusted PTC
Adjusted Pretax Contribution	83	$ 122	267	$ 381
Assets
Total Assets	$ 10,942		$ 10,942		$ 11,329