Segments and Geographic Information Segment and Geographic Information (Adjusted EBITDA & Reconcilliation of Net Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted EBITDA	$ 2,812	$ 2,931	$ 2,580
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in losses of affiliates	(32)	(71)	(24)
Net loss	(182)	(505)	(951)
Income Tax Expense (Benefit)	261	265	(133)
Interest Expense	1,319	1,117	911
Investment Income, Interest	(551)	(389)	(298)
Depreciation and amortization	1,128	1,053	1,056
EBITDA	1,975	1,541	585
Adjustment for noncontrolling interests and redeemable stock of subsidiaries	(552)	(704)	(47)
Less: Income taxes expense (benefit), interest expense (income) and depreciation and amortization from equity affiliates	130	126	123
Interest income recognized under service concession arrangements	71	77	82
Unrealized derivative and equity securities losses (gains)	34	131	(4)
Unrealized foreign currency losses (gains)	301	42	14
Disposition/ acquisition losses	(79)	40	863
Loss on extinguishment of debt	62	20	71
Impairment losses	877	1,658	1,153
Total Adjusted EBITDA	2,812	2,931	2,580
Operating Segments | New Energy Technologies
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted EBITDA	(62)	(116)	(77)
Operating Segments | Renewables
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted EBITDA	645	605	545
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in losses of affiliates	41	28	63
Interest Expense	326	236	200
Investment Income, Interest	(181)	(131)	(55)
Depreciation and amortization	338	260	222
Operating Segments | Utilities
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted EBITDA	678	612	633
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in losses of affiliates	5	6	3
Interest Expense	243	234	218
Investment Income, Interest	(12)	(8)	(5)
Depreciation and amortization	400	376	361
Operating Segments | Energy Infrastructure
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted EBITDA	1,531	1,836	1,494
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in losses of affiliates	6	9	(4)
Interest Expense	534	488	422
Investment Income, Interest	(337)	(246)	(236)
Depreciation and amortization	381	404	458
Intersegment Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted EBITDA	(2)	13	5
Corporate, Non-Segment [Member] | Corporate and Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted EBITDA	22	(19)	(20)
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in losses of affiliates	0	0	0
Interest Expense	216	159	71
Investment Income, Interest	(19)	(4)	(2)
Depreciation and amortization	$ 8	$ 11	$ 14