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Financing Activities - Equity Securities (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Sep. 30, 2023 | Jun. 01, 2023
Securities Financing Transaction [Line Items] |  |  |  |
Annualized current quarterly common stock dividend (in dollars per share) |  | $ 96 |  |
Preferred Stock, Par or Stated Value Per Share |  |  |  | $ 50
Payments for Repurchase of Redeemable Noncontrolling Interest | $ 3 |  |  |
Preferred Stock, Shares Outstanding |  |  |  | 49,089
Preferred Stock Redeemed, Prorated Dividend, Per Share | $ 0.1875 |  |  |
Preferred Stock Redemption, Premium, Per Share | $ 5 |  |  |
Treasury Stock, Common |  |  |  |
Securities Financing Transaction [Line Items] |  |  |  |
Treasury stock acquired |  |  | 38,000 |

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