Fair Value (Tables)
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9 Months Ended |
Sep. 30, 2026 |
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| Fair Value Disclosures [Abstract] |
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| Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
The fair value of assets and liabilities at September 30, 2026 and December 31, 2025 measured on a recurring basis and the respective category within the fair value hierarchy for IPALCO was determined as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fair Value as of September 30, 2026 | | Fair Value as of December 31, 2025 | | Level 1 | | Level 2 | | Level 3 | | Total | | Level 1 | | Level 2 | | Level 3 | | Total | | (In Thousands) | | Financial assets: | | | | | | | | | | | | | | | | | VEBA investments: | | | | | | | | | | | | | | | | | Money market funds | $ | 144 | | | $ | — | | | $ | — | | | $ | 144 | | | $ | 104 | | | $ | — | | | $ | — | | | $ | 104 | | | Mutual funds | 4,689 | | | — | | | — | | | 4,689 | | | 4,324 | | | — | | | — | | | 4,324 | | | Total VEBA investments | 4,833 | | | — | | | — | | | 4,833 | | | 4,428 | | | — | | | — | | | 4,428 | | | FTRs | — | | | — | | | 4,947 | | | 4,947 | | | — | | | — | | | 1,584 | | | 1,584 | | | Commodity derivatives | — | | | 45 | | | — | | | 45 | | | — | | | — | | | — | | | — | | | | | | | | | | | | | | | | | | | Total financial assets measured at fair value | $ | 4,833 | | | $ | 45 | | | $ | 4,947 | | | $ | 9,825 | | | $ | 4,428 | | | $ | — | | | $ | 1,584 | | | $ | 6,012 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Financial liabilities: | | | | | | | | | | | | | | | | | Commodity derivatives | $ | — | | | $ | 2,743 | | | $ | — | | | $ | 2,743 | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | | | | | | | | | | | | | | | | | Total financial liabilities measured at fair value | $ | — | | | $ | 2,743 | | | $ | — | | | $ | 2,743 | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
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| Schedule Of Face And Fair Value Of Debt |
The following table shows the face value and the fair value of fixed-rate and variable-rate indebtedness (Level 2) for the periods ending:
| | | | | | | | | | | | | | | | September 30, 2026 | December 31, 2025 | | Face Value | Fair Value | Face Value | Fair Value | | (In Thousands) | | Fixed-rate | $ | 3,948,800 | | $ | 3,675,038 | | $ | 3,948,800 | | $ | 3,812,563 | | | Variable-rate | 235,000 | | 238,164 | | — | | — | | | Total indebtedness | $ | 4,183,800 | | $ | 3,913,202 | | $ | 3,948,800 | | $ | 3,812,563 | |
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| Fair Value, Assets Measured on Recurring Basis |
The following table presents a roll forward of financial instruments, measured at fair value on a recurring basis, classified as Level 3 in the fair value hierarchy (note, amounts in this table indicate carrying values, which approximate fair values):
| | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | Nine Months Ended September 30, | | 2026 | 2025 | 2026 | 2025 | | | (In Thousands) | | Beginning Balance | | $ | 6,584 | | $ | 4,304 | | $ | 1,584 | | $ | 1,526 | | | Issuances | | — | | — | | 7,237 | | 4,718 | | | Settlements | | (1,637) | | (1,332) | | (3,874) | | (3,272) | | | | | | | | | Ending Balance | | $ | 4,947 | | $ | 2,972 | | $ | 4,947 | | $ | 2,972 | | | | | | | |
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