Weighted Average Useful Lives from Date of Purchase of Intangible Assets (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2021 | |
| Trademarks | |
| Finite-Lived Intangible Assets [Line Items] | |
| Finite-lived intangible asset weighted average economic life | 11 years |
| Technology | |
| Finite-Lived Intangible Assets [Line Items] | |
| Finite-lived intangible asset weighted average economic life | 5 years |
| Intellectual property right | |
| Finite-Lived Intangible Assets [Line Items] | |
| Finite-lived intangible asset weighted average economic life | 8 years |
| Online literature | |
| Finite-Lived Intangible Assets [Line Items] | |
| Finite-lived intangible asset weighted average economic life | 8 years |
| Others | |
| Finite-Lived Intangible Assets [Line Items] | |
| Finite-lived intangible asset weighted average economic life | 13 years |