Risk management - Maximum exposure limits based on credit quality (Details) - Sovereign risk |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| AAA | |||
| Disclosure of credit risk exposure [line items] | |||
| Maximum exposure limit, percentage | 18.00% | 21.00% | 18.00% |
| AA | |||
| Disclosure of credit risk exposure [line items] | |||
| Maximum exposure limit, percentage | 17.00% | 18.00% | 19.00% |
| A | |||
| Disclosure of credit risk exposure [line items] | |||
| Maximum exposure limit, percentage | 43.00% | 41.00% | 41.00% |
| BBB | |||
| Disclosure of credit risk exposure [line items] | |||
| Maximum exposure limit, percentage | 14.00% | 11.00% | 12.00% |
| Less than BBB | |||
| Disclosure of credit risk exposure [line items] | |||
| Maximum exposure limit, percentage | 9.00% | 9.00% | 10.00% |