Leases - Summary of Future Aggregate Undiscounted Non-cancellable Lease Payments (Detail) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Statement [Line Items] | ||
| Lease liabilities | $ 297 | $ 304 |
| Lease liabilities included in the consolidated statement of financial position | ||
| Current | 59 | 58 |
| Non-current | 190 | 198 |
| Within 1 year [Member] | ||
| Statement [Line Items] | ||
| Lease liabilities | 68 | 72 |
| Between 1 and 2 years [Member] | ||
| Statement [Line Items] | ||
| Lease liabilities | 58 | 60 |
| Between 2 and 3 years [Member] | ||
| Statement [Line Items] | ||
| Lease liabilities | 37 | 45 |
| Between 3 and 4 years [Member] | ||
| Statement [Line Items] | ||
| Lease liabilities | 29 | 30 |
| Between 4 and 5 years [Member] | ||
| Statement [Line Items] | ||
| Lease liabilities | 25 | 24 |
| Later than 5 years [Member] | ||
| Statement [Line Items] | ||
| Lease liabilities | $ 80 | $ 73 |