Fair Value Measurements - Components of Change in Fair Value of Contingent Consideration (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 26, 2026 |
Sep. 27, 2025 |
Sep. 26, 2026 |
Sep. 27, 2025 |
|
| Fair Value Measurements [Abstract] | ||||
| Balance, beginning of period | $ 58 | $ 106 | $ 97 | $ 30 |
| Increase in contingent consideration due to business acquisitions and acquisitions of noncontrolling interests in subsidiaries | 0 | 1 | 0 | 95 |
| Decrease in contingent consideration due to payments | (1) | 0 | (5) | (19) |
| Change in fair value of contingent consideration in connection with business acquisitions | 1 | 7 | 0 | 5 |
| Change in fair value of contingent consideration in connection with changes in ownership in consolidated subsidiaries | (31) | (18) | (65) | (15) |
| Balance, end of period | $ 27 | $ 96 | $ 27 | $ 96 |