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Share-based Payment Arrangements - Summary of USISH's outstanding share options balance sheet (Detail) | 12 Months Ended |  |
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Dec. 31, 2024 ¥ / shares | Dec. 31, 2023 ¥ / shares | Dec. 31, 2024 $ / shares | Dec. 31, 2023 $ / shares
USISH Option Plans [member] | 2015 share options [member] |  |  |  |
Disclosure of range of exercise prices of outstanding share options [Line Items] |  |  |  |
Range of Exercise Price Per Share | ¥ 15.5 | ¥ 15.5 |  |
Weighted average remaining contractual life of outstanding share options | 10 months 24 days | 1 year 10 months 24 days |  |
USISH Option Plans [member] | 2019 share options [member] |  |  |  |
Disclosure of range of exercise prices of outstanding share options [Line Items] |  |  |  |
Range of Exercise Price Per Share |  | ¥ 12 |  |
Weighted average remaining contractual life of outstanding share options |  | 10 months 24 days |  |
USISH Option Plans [member] | 2020 Share Options [Member] |  |  |  |
Disclosure of range of exercise prices of outstanding share options [Line Items] |  |  |  |
Range of Exercise Price Per Share |  | ¥ 20.5 |  |
Weighted average remaining contractual life of outstanding share options |  | 10 months 24 days |  |
USISH Option Plans [member] | 2023 share options [member] |  |  |  |
Disclosure of range of exercise prices of outstanding share options [Line Items] |  |  |  |
Range of Exercise Price Per Share | ¥ 14.3 | ¥ 14.5 |  |
Weighted average remaining contractual life of outstanding share options | 1 year 9 months 18 days | 2 years 9 months 18 days |  |
AMPI Option Plans [Member] | 2022 share options [member] |  |  |  |
Disclosure of range of exercise prices of outstanding share options [Line Items] |  |  |  |
Range of Exercise Price Per Share | $ / shares |  |  | $ 29.7 | $ 30
Weighted average remaining contractual life of outstanding share options | 7 years 3 months 18 days | 8 years 3 months 18 days |  |

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- Definition The exercise price of outstanding share options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2024-01-01 -Paragraph 45 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_d&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2024-01-01 -Paragraph 45 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_d&doctype=Standard -URIDate 2024-03-27 + Details
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