Acquisitions - Summary of Acquisition Activity (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Disclosure of detailed information about business combination [line items] | ||||
| Business Acquired | $ 36 | $ 24 | $ 248 | $ 630 |
| Business combinations [member] | Businesses acquired, net of cash [member] | ||||
| Disclosure of detailed information about business combination [line items] | ||||
| Business Acquired | 10 | 0 | 208 | 585 |
| Investments in businesses [member] | ||||
| Disclosure of detailed information about business combination [line items] | ||||
| Business Acquired | 14 | 18 | 26 | 28 |
| Asset acquisition [member] | ||||
| Disclosure of detailed information about business combination [line items] | ||||
| Business Acquired | 0 | 0 | 2 | 0 |
| Contingent consideration payments [member] | ||||
| Disclosure of detailed information about business combination [line items] | ||||
| Business Acquired | $ 12 | $ 6 | $ 12 | $ 17 |