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Common and Preferred Shares (Details Textual) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Mar. 08, 2023
Class of Stock [Line Items] |  |  |  |
Common share repurchases authorized (up to) (in shares) |  |  |  | 120.0
Common shares repurchased (in shares) | 24.0 | 22.0 | 20.0 |
Cost basis of common stock repurchased | $ 6,020 | $ 3,650 | $ 3,502 |
Common shares remaining under share repurchase authorizations (in shares) | 75.0 |  |  |
Shares held as treasury shares (in shares) | 2.2 | 2.3 | 2.4 |
Cost basis of treasury stock | $ 243 | $ 252 | $ 262 |
Preferred shares, authorized, up to (in shares) | 20.0 | 20.0 |  |
Preferred shares, par value (in dollars per share) | $ 1.667 | $ 1.667 |  |
Redemption price per preferred share (in dollars per share) | 1,000,000 |  |  |
Depositary shares redemption amount (in dollars per share) | 1,000 |  |  |
Series D Preferred Stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred shares, par value (in dollars per share) | $ 1.667 |  |  |
Repurchase Agreements |  |  |  |
Class of Stock [Line Items] |  |  |  |
Cost basis of common stock repurchased | $ 5,900 | $ 3,500 | 3,300 |
Commissions and excise tax paid included in cost basis of common stock repurchased | $ 55 | $ 32 |  |
Commissions paid included in cost basis of common stock repurchased |  |  | $ 4 |

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