Schedule of Unrealized and Realized Gains and Losses of Equity Securities Without Readily Determinable Fair Values (Detail) ¥ in Millions, $ in Millions |
Dec. 31, 2025
CNY (¥)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
CNY (¥)
|
|---|---|---|---|
| Equity Investments Without Readily Determinable Fair Value Using The Measurement Alternative [Abstract] | |||
| Initial cost basis | ¥ 10,063 | $ 1,439 | ¥ 9,083 |
| Cumulative unrealized gains | 1,443 | 206 | 1,193 |
| Cumulative unrealized losses (including impairment) | (5,781) | (826) | (6,126) |
| Total carrying value | ¥ 5,725 | $ 819 | ¥ 4,150 |