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Shareholders' Equity - Shares Repurchased and Reissued (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Jan. 31, 2022
Equity, Class of Treasury Stock [Line Items] |  |  |
Repurchase of common shares | $ 657 | $ 579 |
Stock repurchase program, authorized amount |  |  | $ 3,000
Remaining balance under stock repurchase program | $ 1,100 |  |
Reissuance of treasury stock (in shares) | 0.6 | 0.5 |
Common Stock Repurchases |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Repurchase of common shares (in shares) | 1.6 | 1.4 |
Repurchase of common shares | $ 506 | $ 429 |
Restricted Stock Units Repurchases |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Repurchase of common shares (in shares) | 0.3 | 0.3 |
Repurchase of common shares | $ 87 | $ 89 |
Option Repurchases |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Repurchase of common shares (in shares) | 0.2 | 0.2 |
Repurchase of common shares | $ 63 | $ 62 |

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