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Share-Based Compensation - Summary of Stock-Based Compensation Expense (Parenthetical) (Detail) - CNY (¥) ¥ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 27, 2020 | Jun. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
stockbased compensation expense [Line Items] |  |  |  |  |
Share-based Payment arrangement, expense |  |  | ¥ 1,923,646 | ¥ 657,236 | ¥ 34,250
General and Administrative Expense [Member] |  |  |  |  |
stockbased compensation expense [Line Items] |  |  |  |  |
Share-based Payment arrangement, expense |  |  | 1,680,626 | 602,960 | ¥ 11,268
TECHWOLF LIMITED [Member] | Common Class B [Member] |  |  |  |  |
stockbased compensation expense [Line Items] |  |  |  |  |
Number of new stock issued during the period | 24,780,971 | 24,745,531 |  |  |
TECHWOLF LIMITED [Member] | General and Administrative Expense [Member] |  |  |  |  |
stockbased compensation expense [Line Items] |  |  |  |  |
Share-based Payment arrangement, expense |  |  | ¥ 1,506,400 | ¥ 533,100 |

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