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Debt - Non-Recourse Debt Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Debt Instrument [Line Items] |  |  |  |  |
Proceeds From Issuance Of Nonrecourse Debt |  |  |  | $ 700 | $ 1,913
Loss on extinguishment of debt | $ (18) |  | $ (40) | $ (19) | (41)
DPL Subsidiary [Member] | Senior Notes [Member] | 4.125% Senior Notes due 2025 [Domain] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Issued senior notes |  |  | $ 415 |  | $ 415
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.125% |  | 4.125%
DPL Subsidiary [Member] | Senior Notes [Member] | 7.25% Senior Notes due 2021 [Domain] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 7.25% |  | 7.25%
Redeemed notes |  |  |  |  | $ 380
AES Tiete [Domain] | Nonrecourse Debt [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of Long-term Debt |  | $ 0 |  |  |
Loss on extinguishment of debt |  | 0 |  |  |
IPALCO Enterprises, Inc. [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  | (2)
IPALCO Enterprises, Inc. [Member] | Senior Notes [Member] | 4.25% Senior Notes due 2030 [Domain] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Issued senior notes |  |  | $ 475 |  | $ 475
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.25% |  | 4.25%
IPALCO Enterprises, Inc. [Member] | Senior Notes [Member] | 3.45% Senior Notes due 2020 [Domain] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 3.45% |  | 3.45%
Redeemed notes |  |  |  |  | $ 405
IPALCO Enterprises, Inc. [Member] | Senior Notes [Member] | 65 Million Term Loan due 2020 [Domain] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Redeemed notes |  |  |  |  | $ 65
AES Brasil [Domain] | Nonrecourse Debt [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Proceeds From Issuance Of Nonrecourse Debt |  | $ 140 |  |  |
AES Andres | Nonrecourse Debt [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Proceeds From Issuance Of Nonrecourse Debt | 300 |  |  |  |
Repayments of Long-term Debt | (274) |  |  |  |
Loss on extinguishment of debt | $ 14 |  |  |  |

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