Financial Risks - Summary of Information on Historical Net Result and Shareholders' Equity (Detail) £ in Millions, $ in Millions |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2025
GBP (£)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2024
GBP (£)
|
Dec. 31, 2023
USD ($)
|
Dec. 31, 2023
GBP (£)
|
|
| Americas [member] | ||||||
| Disclosure of historical net income (loss) and shareholders' equity [line items] | ||||||
| Net result | $ | $ 423 | $ 198 | $ (266) | |||
| Equity in functional currency | $ | $ 5,599 | $ 3,838 | $ 3,690 | |||
| United Kingdom [member] | ||||||
| Disclosure of historical net income (loss) and shareholders' equity [line items] | ||||||
| Net result | £ | £ 24 | £ 56 | £ 26 | |||
| Equity in functional currency | £ | £ 1,087 | £ 1,198 | £ 1,256 | |||