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Equity (Common Stock - Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Class of Stock [Line Items] |  |  |
Cost of shares issued | $ 105 | $ 193 | $ 160
Repurchase Shares | 49,732,851 | 72,296,518 | 26,361,487
Treasury Stock, Value, Acquired, Cost Method | $ 3,301 | $ 4,328 | $ 1,151
Stock Repurchase Program, Remaining Authorized Repurchase Amount | 1,200 |  |
Dividends, Common Stock, Cash | (1,598) | (1,647) | (1,657)
Retained Earnings |  |  |
Class of Stock [Line Items] |  |  |
Dividends, Common Stock, Cash | (1,598) | $ (1,647) | $ (1,657)
August2021Authorization |  |  |
Class of Stock [Line Items] |  |  |
Treasury Stock, Value, Acquired, Cost Method | 25 |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 0 |  |
Common Shares Issued For Stock Options [Member] |  |  |
Class of Stock [Line Items] |  |  |
Stock Issued During Period, Shares, New Issues | 3,290,998 | 4,926,185 | 3,933,989
Cost of shares issued | $ 156 | $ 195 | $ 153
Treasury Shares Issued For Stock Options [Member] |  |  |
Class of Stock [Line Items] |  |  |
Issued Treasury Stock | 0 | 0 | 0
Common Stock [Member] |  |  |
Class of Stock [Line Items] |  |  |
Dividends, Common Stock, Cash | $ (1,600) | $ (1,600) | $ (1,700)

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