Fair Value Measurements - Changes in Level 3 Financial Assets and Liabilities Measured on Recurring Basis (Detail) - Contingent Consideration - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation | |||
| Balance as of January 1 | $ 102 | $ 106 | $ 173 |
| Business combinations | 59 | 77 | 64 |
| Contingent consideration paid | (22) | (10) | (73) |
| Revaluations included in earnings and foreign currency translation adjustments | (34) | (71) | (58) |
| Balance as of December 31 | $ 105 | $ 102 | $ 106 |