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Business Combinations - Additions, Payments, and Net Changes, as well as Interest Expense Accretion on Estimated Acquisition Earn-Out Payables (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Business Combinations [Abstract] |  |  |  |
Beginning balance | $ 203 | $ 254 | $ 249 | $ 252
Additions to estimated acquisition earn-out payables | 10 | 21 | 19 | 40
Payments for estimated acquisition earn-out payables | (45) | (47) | (96) | (64)
Subtotal | 168 | 228 | 172 | 228
Net change in earnings from estimated acquisition earn-out payables: |  |  |  |
Change in fair value on estimated acquisition earn-out payables | (2) | 0 | (7) | (4)
Interest expense accretion | 3 | 2 | 5 | 4
Net change in earnings from estimated acquisition earn-out payables | 1 | 2 | (2) | 0
Foreign currency translation adjustments during the year | 0 | 2 | (1) | 4
Ending balance | $ 169 | $ 232 | $ 169 | $ 232

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