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Asset Impairment Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 29	$ 849	$ 1,374	$ 855
Other Asset Impairment Charges	29	849	1,374	855
AES Hawaii
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use	0	38	0	38
AES Hawaii | Long Lived Assets Held And Used [Member]
Asset Impairment Expense [Line Items]
Other Asset Impairment Charges				38
AES Panama
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use	11	30	11	30
AES Panama | Long Lived Assets Held And Used [Member]
Asset Impairment Expense [Line Items]
Other Asset Impairment Charges			11	30
Other Subsidiaries [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use	18	4	17	10
AES Puerto Rico
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use	0	0	475	0
Assets Carrying Amount Disclosure Nonrecurring	73		73
AES Puerto Rico | Long Lived Assets Held And Used [Member]
Asset Impairment Expense [Line Items]
Other Asset Impairment Charges			475
Mountain View Power Partners
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use			67
Mountain View Power Partners | Long Lived Assets Held And Used [Member]
Asset Impairment Expense [Line Items]
Other Asset Impairment Charges	0	0	67	0
Angamos [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use			155	564
Angamos [Member] | Long Lived Assets Held And Used [Member]
Asset Impairment Expense [Line Items]
Other Asset Impairment Charges	0	564	155	564
Ventanas [Domain]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use				213
Ventanas [Domain] | Long Lived Assets Held And Used [Member]
Asset Impairment Expense [Line Items]
Other Asset Impairment Charges	0	213	0	213
Ventanas 3 & 4
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use			649
Ventanas 3 & 4 | Long Lived Assets Held And Used [Member]
Asset Impairment Expense [Line Items]
Other Asset Impairment Charges	$ 0	$ 0	$ 649	$ 0

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

This element represents the aggregate carrying amount of the assets measured at fair value on a nonrecurring basis by the entity before the recognition of impairment charges.

+ References

No definition available.

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2420-110228

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- Definition

The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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