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Equity (Share Repurchases Authorizations) (Details) - USD ($) shares in Millions, $ in Billions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 11, 2023 | Feb. 07, 2023
Increased Under September 2019 Board Of Directors Authorization |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  | $ 2.5 |  |
Under February 2023 Board Of Directors Authorization |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  | $ 1.0
Under November 2021 Board Of Directors Authorization |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  | $ 1.5 |  |  |
Under December 2023 Board Of Directors Authorization |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  | $ 1.0 |
Other common stocks | Increased Under September 2019 Board Of Directors Authorization |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Number of Treasury Stock Shares Acquired |  |  | 24.5 |  |
Other common stocks | Under February 2023 Board Of Directors Authorization |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Number of Treasury Stock Shares Acquired | 10.9 |  |  |  |
Other common stocks | Under November 2021 Board Of Directors Authorization |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Number of Treasury Stock Shares Acquired |  | 14.5 |  |  |

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