Equity Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 397,000,000
Unfunded pension obligation, Net of Tax	(32,000,000)		$ (30,000,000)
Foreign currency translation adjustment, Net of Tax	(1,656,000,000)		(1,734,000,000)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,899,000,000)		(2,220,000,000)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	389,000,000
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(211,000,000)		$ (456,000,000)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	8,000,000
Total foreign currency translation adjustment, net of income tax	132,000,000	$ (69,000,000)
Total pension adjustments, net of income tax	(1,000,000)	$ (1,000,000)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	258,000,000
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	7,000,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	265,000,000
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1,000,000
Total pension adjustments, net of income tax	1,000,000
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	131,000,000
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0
Total foreign currency translation adjustment, net of income tax	131,000,000
Gener Subsidiary [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(76,000,000)
AES Brasil [Domain]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment, Net of Tax	(53,000,000)
AES Brasil [Domain] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(20,000,000)
AES Brasil [Domain] | Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unfunded pension obligation, Net of Tax	$ (3,000,000)