Share based payments - Stock options Narrative (Details) $ in Millions |
6 Months Ended | |
|---|---|---|
|
Jun. 30, 2026
USD ($)
shares
|
Jun. 30, 2025
USD ($)
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Number of shares on conversion (in shares) | shares | 1 | |
| Total share based payment expense | $ | $ 52 | $ 55 |
| Non-executive director | Stock options | ||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Vesting period | 3 years | |
| Executive directors | Stock options | January 1, 2026 Grants | ||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Vesting period | 3 years | |
| Share based compensation award tranche one | ||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Vesting percentage | 0.3333 | |
| Share based compensation award tranche two | ||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Vesting percentage | 0.0278 | |