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Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Balance, January 1 | $ 962 | $ 1,024 | $ 790
Increases: |  |  |
Current year tax positions | 132 | 119 | 64
Tax positions related to prior years | 40 | 30 | 225
Decreases: |  |  |
Tax positions related to prior years | (50) | (30) | (14)
Settlements with tax authorities | (160) | (74) | (15)
Lapse of statute of limitations | (49) | (104) | (17)
Effects of foreign currency translations | 0 | (3) | (9)
Balance, December 31 | $ 875 | $ 962 | $ 1,024

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