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v3.23.3

U.S. and Europe Retrospective Responsibility Plans - Changes in Preferred Stock and Right to Recover Covered Losses (Details) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Sep. 30, 2023 USD ($) $ / shares shares | Sep. 30, 2022 USD ($) $ / shares shares | Sep. 30, 2021 USD ($) shares | Sep. 30, 2020 shares
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning Balance | $ 35,581 |  | $ 37,589 |  | $ 36,210 |  |
VE territory covered losses incurred | (136) |  | (43) |  | (147) |  |
Recovery through conversion rate adjustment | 1 |  | 0 |  | (2) |  |
Ending Balance | 38,733 |  | 35,581 |  | 37,589 |  |
As-converted Value of Preferred Stock | 4,311 |  | 3,353 |  |  |  |
Book Value of Preferred Stock | 1,698 |  | 2,324 |  |  |  |
Book Value of Preferred Stock, Total | 1,242 |  | 1,272 |  |  |  |
Less: right to recover for covered losses | (140) |  | (35) |  |  |  |
As-converted value of Preferred Stock, Total recovery for covered losses available | 4,171 |  | 3,318 |  |  |  |
Book value of Preferred of Stock, Total recovery for covered losses available | $ 1,102 |  | 1,237 |  |  |  |
Share price (in dollars per share) | $ / shares | $ 230.01 |  |  |  |  |  |
Series B |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Recovery through conversion rate adjustment | $ 19 |  | 135 |  | 35 |  |
As-converted Value of Preferred Stock | 1,676 |  | 1,309 |  |  |  |
Book Value of Preferred Stock | $ 441 |  | $ 460 |  |  |  |
Preferred stock, shares outstanding (in shares) | shares | 2 |  | 2 |  |  |  |
Preferred stock, conversion rate | 2.9370 |  | 2.9710 |  |  |  |
Series C |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Recovery through conversion rate adjustment | $ 11 |  | $ 6 |  | 20 |  |
As-converted Value of Preferred Stock | 2,635 |  | 2,044 |  |  |  |
Book Value of Preferred Stock | $ 801 |  | $ 812 |  |  |  |
Preferred stock, shares outstanding (in shares) | shares | 3 |  | 3 |  |  |  |
Preferred stock, conversion rate | 3.6290 |  | 3.6450 |  |  |  |
Class A common stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Share price (in dollars per share) | $ / shares | $ 230.01 |  | $ 177.65 |  |  |  |
Preferred Stock |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning Balance | $ 2,324 | [1],[2] | $ 3,080 | [1] | 5,086 |  |
Recovery through conversion rate adjustment | (30) |  | (141) |  | (55) |  |
Ending Balance | $ 1,698 | [2] | $ 2,324 | [1],[2] | $ 3,080 | [1] |
Preferred stock, shares outstanding (in shares) | shares | 5 |  | 5 |  | 5 |  | 5
Preferred Stock | Series B |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning Balance | $ 460 |  | $ 1,071 |  |  |  |
VE territory covered losses incurred | 0 |  | 0 |  |  |  |
Recovery through conversion rate adjustment | (19) |  | (135) |  |  |  |
Sixth Anniversary Release |  |  | (476) |  |  |  |
Ending Balance | 441 |  | 460 |  | $ 1,071 |  |
Preferred Stock | Series C |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning Balance | 812 |  | 1,523 |  |  |  |
VE territory covered losses incurred | 0 |  | 0 |  |  |  |
Recovery through conversion rate adjustment | (11) |  | (6) |  |  |  |
Sixth Anniversary Release |  |  | (705) |  |  |  |
Ending Balance | 801 |  | 812 |  | 1,523 |  |
Right to Recover for Covered Losses |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Beginning Balance | (35) |  | (133) |  | (39) |  |
VE territory covered losses incurred | (136) |  | (43) |  | (147) |  |
Recovery through conversion rate adjustment | 31 |  | 141 |  | 53 |  |
Sixth Anniversary Release |  |  | 0 |  |  |  |
Ending Balance | $ (140) |  | $ (35) |  | $ (133) |  |
[1] | As of September 30, 2022 and 2021, the book value of series A preferred stock was $1.0 billion and $486 million, respectively. Refer to Note 5—U.S. and Europe Retrospective Responsibility Plans for the book value of series B and series C preferred stock.
[2] | As of September 30, 2023 and 2022, the book value of series A preferred stock was $456 million and $1.0 billion, respectively. Refer to Note 5—U.S. and Europe Retrospective Responsibility Plans for the book value of series B and series C preferred stock.

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