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Earnings Per Share - Share Repurchase Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Earnings Per Share [Abstract] |  |  |
Stock repurchased (in shares) | 112 | 151 | 90
Cost of shares | $ 3,482 | $ 4,731 | $ 2,886
Average price paid per share (in dollars per share) | $ 30.95 | $ 31.25 | $ 31.91

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