Segments (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Total Revenue	$ 2,700	$ 2,217	$ 5,335	$ 4,555
Number of strategic business units | segment			4
Number of reportable segments | segment			4
Adjusted PTC
Adjusted Pretax Contribution	303	238	$ 550	488
Reconciliation To Income From Continuing Operations Before Taxes
Unrealized derivative losses (gains)	(8)	(14)	(77)	2
Unrealized foreign currency transaction losses (gains)	12	12	6	3
Disposition/acquisition losses (gains)	229	(29)	244	(30)
Impairment losses	(628)	(168)	(1,103)	(221)
Extinguishment of debt losses (gains)	(18)	(44)	(24)	(48)
Gain (Loss) on Contract Termination	(110)	0	(220)	0
Pretax contribution	0	(5)	(184)	194
Net equity in earnings (losses) of affiliates	(10)	8	(40)	6
Less: Income (loss) from continuing operations before taxes, attributable to noncontrolling interests	(140)	118	23	237
Income (loss) from continuing operations before taxes and equity in earnings of affiliates	(130)	105	(121)	425
Assets
Total Assets	34,727		34,727		$ 34,603
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total Revenue	(40)	(116)	(67)	(146)
Adjusted PTC
Adjusted Pretax Contribution	15	11	25	7
US and Utilities [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	972	913	1,921	1,884
Adjusted PTC
Adjusted Pretax Contribution	128	57	172	128
Assets
Total Assets	14,949		14,949		14,464
MCAC [Member]
Segment Reporting Information [Line Items]
Total Revenue	490	381	1,025	813
MCAC [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	490	381	1,025	813
Adjusted PTC
Adjusted Pretax Contribution	71	66	132	144
Assets
Total Assets	4,610		4,610		4,847
EURASIA [Member]
Segment Reporting Information [Line Items]
Total Revenue	277	214	547	439
EURASIA [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	277	214	547	439
Adjusted PTC
Adjusted Pretax Contribution	48	49	99	93
Assets
Total Assets	3,575		3,575		3,621
Corporate Other And Other Eliminations [Member]
Segment Reporting Information [Line Items]
Total Revenue	(3)	(2)	(6)	(4)
Corporate Other And Other Eliminations [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	37	114	61	142
Adjusted PTC
Adjusted Pretax Contribution	(55)	(85)	(62)	(143)
Assets
Total Assets	757		757		342
South American SBU
Segment Reporting Information [Line Items]
Total Revenue	964	711	1,848	1,423
South American SBU | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenue	964	711	1,848	1,423
Adjusted PTC
Adjusted Pretax Contribution	96	$ 140	184	$ 259
Assets
Total Assets	$ 10,836		$ 10,836		$ 11,329