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Share-based Payment Arrangements - Summary of Information About Restricted Shares (Detail) | 12 Months Ended
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Dec. 31, 2021 shares ¥ / shares | Dec. 31, 2020 shares ¥ / shares | Dec. 31, 2019 shares ¥ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Options exercisable, end of year | shares | 0 |  |
Exercise Price Per Share, Options exercisable, end of year | ¥ 0 |  |
USISH option plans [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Balance at January 1 | shares | 5,547,000 | 6,156,000 |
Options granted | shares | 281,000 | 672,000 | 6,156,000
Options exercised | shares | (1,780,000) | (1,281,000) |
Options forfeited | shares | (483,000) |  |
Balance at December 31 | shares | 3,565,000 | 5,547,000 | 6,156,000
Fair value of options granted (RMB) | ¥ 11.78 | ¥ 18.55 | ¥ 13.47
Exercise Price Per Share, Begining | 12.2 | 13.3 |
Exercise Price Per Share, Options granted | 0 | 4.9 | 13.3
Exercise Price Per Share, Options exercised | 12.7 | 13.2 |
Exercise Price Per Share, Options forfeited | 12.1 |  |
Exercise Price Per Share, Ending | ¥ 10.2 | ¥ 12.2 | ¥ 13.3

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- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_47_b&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The number of other equity instruments (ie other than share options) exercisable in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The number of other equity instruments (ie other than share options) forfeited in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45&doctype=Standard -URIDate 2021-03-24 + Details
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