Deferred income taxes - Other information (Details) - CNY (¥) ¥ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Deferred income taxes | |||
| Deferred tax assets not recognized | ¥ 61,064 | ¥ 77,570 | ¥ 84,117 |
| Cumulative losses available for utilization | 39,398 | 54,407 | 61,929 |
| Mainland China | |||
| Deferred income taxes | |||
| Cumulative losses available for utilization | ¥ 41,653 | 51,011 | 53,697 |
| Mainland China | Minimum | |||
| Deferred income taxes | |||
| Expiration period for tax losses | 1 year | ||
| Mainland China | Maximum | |||
| Deferred income taxes | |||
| Expiration period for tax losses | 10 years | ||
| Overseas entities | |||
| Deferred income taxes | |||
| Cumulative losses available for utilization | ¥ 7,783 | ¥ 4,173 | ¥ 8,742 |