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v3.23.1

Equity - Additional Information (Detail) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 shares $ / shares | Dec. 31, 2021 shares | Nov. 30, 2021 shares | Nov. 08, 2021 $ / shares
Disclosure of classes of share capital [line items] |  |  |  |
Number of shares represented by each ADS | 2 |  |  |
Percentage of legal reserve on share capital | 25.00% |  |  |
American depository shares (ADs) [member] |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Number of shares represented by each ADS | 2 |  |  |
Number of shares outstanding | 157,164,000 | 157,164,000 |  |
Ordinary shares [member] |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Number of shares outstanding | 314,328,000 | 314,328,000 |  |
Ordinary shares [member] | Board of Directors [Member] |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Number of ordinary shares issued | 55,000,000 |  | 55,000,000 |
J & R Holding Limited [member] |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Number of shares remitted | 23,352,000 |  |  |
ASE Test Limited [member] |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Number of shares remitted | 44,100,000 |  |  |
Top of range [member] |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Percentage of cash dividend on dividend distribution | 30.00% |  |  |
Top of range [member] | Ordinary shares [member] |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Weighted average share price | $ / shares | $ 104.3 |  |  |
Top of range [member] | Ordinary shares [member] | Board of Directors [Member] |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Par value per share | $ / shares |  |  |  | $ 150
Bottom of range [member] | Ordinary shares [member] | Board of Directors [Member] |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Par value per share | $ / shares |  |  |  | $ 90

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