Accounts Receivable - Summary of Loss Allowances for Accounts Receivable (Details) - CNY (¥) ¥ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Trade and other receivables [abstract] | ||
| Beginning Balance | ¥ 22 | ¥ 77 |
| Provision for loss allowance recognized in income statement | 6 | 17 |
| Receivables written off during the year as uncollectible | 0 | (72) |
| Ending Balance | ¥ 28 | ¥ 22 |