Segments (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Total Revenue	$ 3,627	$ 3,036	$ 9,557	$ 8,371
Number of strategic business units | segment			4
Number of reportable segments | segment			4
Reconciliation To Income From Continuing Operations Before Taxes
Income (loss) from continuing operations before taxes and equity in earnings of affiliates	617	586	$ 721	465
Net equity in earnings (losses) of affiliates	(26)	25	(54)	(15)
Less: Income (loss) from continuing operations before taxes, attributable to noncontrolling interests	42	117	161	140
Pretax contribution	549	494	506	310
Unrealized derivative losses (gains)	8	53	2	(24)
Unrealized foreign currency transaction losses (gains)	(3)	(11)	(23)	(5)
Disposition/acquisition losses (gains)	(4)	33	(36)	277
Impairment losses	(17)	(18)	(497)	(1,121)
Extinguishment of debt losses (gains)	(4)	(27)	(20)	(51)
Gain (Loss) on Contract Termination	0	(36)	0
Adjusted Pretax Contribution	569	428	1,080	978
Assets
Total Assets	37,775		37,775		$ 32,963
Gener Subsidiary [Member]
Reconciliation To Income From Continuing Operations Before Taxes
Gain (Loss) on Contract Termination				(256)
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total Revenue	(30)	(24)	(101)	(91)
Reconciliation To Income From Continuing Operations Before Taxes
Adjusted Pretax Contribution	(7)	12	23	37
US and Utilities [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	1,506	1,327	3,820	3,248
Reconciliation To Income From Continuing Operations Before Taxes
Adjusted Pretax Contribution	192	254	319	426
Assets
Total Assets	19,828		19,828		16,512
MCAC [Member]
Segment Reporting Information [Line Items]
Total Revenue	940	559	2,192	1,584
MCAC [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	940	559	2,192	1,584
Reconciliation To Income From Continuing Operations Before Taxes
Adjusted Pretax Contribution	298	81	422	213
Assets
Total Assets	5,249		5,249		4,545
EURASIA [Member]
Segment Reporting Information [Line Items]
Total Revenue	261	257	947	804
EURASIA [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	261	257	947	804
Reconciliation To Income From Continuing Operations Before Taxes
Adjusted Pretax Contribution	47	45	154	144
Assets
Total Assets	2,708		2,708		3,466
Corporate Other And Other Eliminations [Member]
Segment Reporting Information [Line Items]
Total Revenue	(6)	(3)	(18)	(9)
Corporate Other And Other Eliminations [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	24	21	83	82
Reconciliation To Income From Continuing Operations Before Taxes
Adjusted Pretax Contribution	(63)	(47)	(213)	(109)
Assets
Total Assets	936		936		712
South American SBU
Segment Reporting Information [Line Items]
Total Revenue	926	896	2,616	2,744
South American SBU | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	926	896	2,616	2,744
Reconciliation To Income From Continuing Operations Before Taxes
Adjusted Pretax Contribution	102	$ 83	375	$ 267
Assets
Total Assets	$ 9,054		$ 9,054		$ 7,728