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Debt - Non-Recourse Debt Narrative (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($)
Debt Instrument [Line Items] |  |  |
Debt defaults at risk of causing cross default |  | 0 |
Loss on extinguishment of debt |  | $ 1 | $ 10
Proceeds From Issuance Of Nonrecourse Debt |  | 406 | $ 866
Nonrecourse Debt [Member] | AES Southland [Domain] |  |  |
Debt Instrument [Line Items] |  |  |
Proceeds From Issuance Of Nonrecourse Debt | [1] | 112 |
Nonrecourse Debt [Member] | Gener Subsidiary [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Proceeds From Issuance Of Nonrecourse Debt |  | $ 85 |
London Interbank Offered Rate (LIBOR) [Member] | LIBOR 1.75% Term Loan Due In 2022 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 1.75% |
London Interbank Offered Rate (LIBOR) [Member] | LIBOR 2.25% Senior Notes Due In 2029 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 2.25% |
London Interbank Offered Rate (LIBOR) [Member] | LIBOR 4.15% Senior Notes Due In 2029 [Member] [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 4.15% |
[1] | Issuances relate to the June 2017 long-term non-recourse debt financing to fund the Southland repowering construction projects.

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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629 Reference 3: 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=121586364&loc=d3e3602-108585 + Details
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