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Earnings Per Share - Share Repurchases (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Earnings Per Share [Abstract] |  |  |  |
Shares Repurchased (in shares) | 28 | 47 | 63 | 76
Cost of Shares | $ 863 | $ 1,499 | $ 1,930 | $ 2,515

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