Related Parties - Summary of Directors and Executive Board Management Compensation (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Directors [member] | |||
| Disclosure of transactions between related parties [line items] | |||
| Short-term employee benefits | $ 2 | $ 2 | $ 2 |
| Total Compensation | 2 | 2 | 2 |
| Executive Committee [member] | |||
| Disclosure of transactions between related parties [line items] | |||
| Short-term employee benefits | 11 | 15 | 12 |
| Share-based payment | 57 | 55 | 46 |
| Total Compensation | $ 68 | $ 70 | $ 58 |