CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (UNAUDITED) (Parenthetical) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2026 |
Mar. 31, 2025 |
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| Dividends declared, quarterly, per share (in dollars per share) | $ 0.67 | $ 0.59 | $ 0.67 | $ 0.59 | ||
| Dividends paid, quarterly, per share (in dollars per share) | $ 0.67 | $ 0.59 | $ 0.67 | $ 0.59 | ||
| Book value of preferred stock | $ 528 | $ 528 | $ 745 | |||
| Series A preferred stock | ||||||
| Book value of preferred stock | $ 405 | $ 397 | $ 405 | $ 397 | $ 513 | $ 540 |