Schedule of Unrealized and Realized Gains and Losses of Equity Securities Without Readily Determinable Fair Values (Parenthetical) (Detail) ¥ in Millions, $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2021
CNY (¥)
|
Dec. 31, 2021
USD ($)
|
Dec. 31, 2020
CNY (¥)
|
Dec. 31, 2019
CNY (¥)
|
|
| Equity Securities, FV-NI and without Readily Determinable Fair Value [Abstract] | ||||
| Equity securities gross unrealized loss excluding impairment | ¥ 165 | $ 26 | ¥ 378 | ¥ 863 |