Finance costs (Details) - CNY (¥) ¥ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Finance Cost [Abstract] | |||
| Interest and related expenses | ¥ 122 | ¥ 124 | ¥ 124 |
| Exchange losses/(gains) | 7 | (30) | 17 |
| Finance costs | ¥ 129 | ¥ 94 | ¥ 141 |