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CONSOLIDATED STATEMENTS OF CHANGES IN PROPRIETARY CAPITAL (UNAUDITED) - USD ($) | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2024 | Dec. 31, 2024 | Sep. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023
Power Program Appropriation Investment | $ 258,000,000 |  | $ 258,000,000 |  |  |  |  |  |
Power Program Retained Earnings | 16,970,000,000 |  | 16,970,000,000 |  |  |  |  |  |
Nonpower Programs Appropriation Investment, Net | 514,000,000 |  | 514,000,000 |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) from Net Gains (Losses) on Cash Flow Hedges | (52,000,000) | $ (26,000,000) | (52,000,000) | $ (26,000,000) | $ (26,000,000) | $ (34,000,000) | $ (52,000,000) | $ (28,000,000) | $ (29,000,000)
Total Proprietary Capital | 17,690,000,000 | 16,489,000,000 | 17,690,000,000 | 16,489,000,000 | 16,489,000,000 | 17,302,000,000 | 17,161,000,000 | 16,182,000,000 | 16,056,000,000
Net income (loss) | 408,000,000 | 307,000,000 | 533,000,000 | 434,000,000 | 434,000,000 |  |  |  |
Total other comprehensive income (loss) | (18,000,000) | 2,000,000 | 0 | 3,000,000 | 3,000,000 |  |  |  |
Return on power program appropriation investment | (2,000,000) | (2,000,000) | (4,000,000) |  | (4,000,000) |  |  |  |
Power Program Appropriation Investment |  |  |  |  |  |  |  |  |
Power Program Appropriation Investment | 258,000,000 | 258,000,000 | 258,000,000 | 258,000,000 | 258,000,000 | 258,000,000 | 258,000,000 | 258,000,000 | 258,000,000
Net income (loss) | 0 | 0 | 0 | 0 |  |  |  |  |
Total other comprehensive income (loss) | 0 | 0 | 0 | 0 |  |  |  |  |
Return on power program appropriation investment | 0 | 0 | 0 | 0 |  |  |  |  |
Power Program Retained Earnings |  |  |  |  |  |  |  |  |
Power Program Retained Earnings | 16,970,000,000 | 15,736,000,000 | 16,970,000,000 | 15,736,000,000 | 15,736,000,000 | 16,562,000,000 | 16,437,000,000 | 15,429,000,000 | 15,302,000,000
Net income (loss) | 410,000,000 | 309,000,000 | 537,000,000 | 438,000,000 |  |  |  |  |
Total other comprehensive income (loss) | 0 | 0 | 0 | 0 |  |  |  |  |
Return on power program appropriation investment | (2,000,000) | (2,000,000) | (4,000,000) | (4,000,000) |  |  |  |  |
Nonpower Programs Appropriation Investment, Net |  |  |  |  |  |  |  |  |
Nonpower Programs Appropriation Investment, Net | 514,000,000 | 521,000,000 | 514,000,000 | 521,000,000 | $ 521,000,000 | $ 516,000,000 | $ 518,000,000 | $ 523,000,000 | $ 525,000,000
Net income (loss) | (2,000,000) | (2,000,000) | (4,000,000) | (4,000,000) |  |  |  |  |
Total other comprehensive income (loss) | 0 | 0 | 0 | 0 |  |  |  |  |
Return on power program appropriation investment | 0 | 0 | 0 | 0 |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) from Net Gains (Losses) on Cash Flow Hedges |  |  |  |  |  |  |  |  |
Net income (loss) | 0 | 0 | 0 | 0 |  |  |  |  |
Total other comprehensive income (loss) | (18,000,000) | 2,000,000 | 0 | 3,000,000 |  |  |  |  |
Return on power program appropriation investment | $ 0 | $ 0 | $ 0 | $ 0 |  |  |  |  |

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