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Share-based Payment Arrangements - Summary of Information About USISH Option Plans (Detail) - USISH option plans [member] ¥ / shares in Units, shares in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 CNY (¥) shares ¥ / shares | Dec. 31, 2020 CNY (¥) shares ¥ / shares | Dec. 31, 2019 shares $ / shares ¥ / shares | Dec. 31, 2019 CNY (¥) shares ¥ / shares
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Number of options, beginning balance | 31,266 | 35,077 |  | 21,537
Number of options, granted | 0 | 1,140 |  | 17,167
Number of options, forfeited | (952) | (636) |  | (463)
Number of options, exercised | (828) | (4,315) |  | (3,164)
Number of options, Ending balance | 29,486 | 31,266 |  | 35,077
Number of options, exercisable, end of year | 19,249 | 13,416 | 13,694 | 13,694
Weighted average exercise price, Beginning balance | ¥ / shares | ¥ 14.6 | ¥ 14.5 |  | ¥ 15.5
Weighted average exercise price options granted | (per share) | 0 | 21.7 | $ 13.3 |
Weighted average exercise price, Options forfeited | ¥ / shares | 14.5 | 14.0 |  | 15.4
Weighted average exercise price options exercised | ¥ / shares | 13.8 | 15.5 |  | 15.5
Weighted average exercise price, Ending balance | ¥ / shares | 14.2 | 14.6 |  | 14.5
Weighted average exercise price, Options exercisable, end of year | ¥ / shares | ¥ 14.8 | ¥ 15.5 | $ 15.5 | ¥ 15.5
Fair value of options granted | ¥ | ¥ 0 |  |  |
Bottom of range [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Fair value of options granted | ¥ |  | ¥ 7.03 |  | ¥ 6.27
Top of range [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Fair value of options granted | ¥ |  | ¥ 8.93 |  | ¥ 8.35

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