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Business Combinations - Additional Information (Detail) $ in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 TWD ($) | Dec. 31, 2020 TWD ($) | Dec. 31, 2020 USD ($) shares | Dec. 31, 2022 | Nov. 01, 2021
Disclosure of subsidiaries [Line Items] |  |  |  |  |
Revenue from continuing operations | $ 570,363,380 | $ 497,146,285 |  |  |
Profit from continuing operations | $ 62,277,713 | 28,833,916 |  |  |
USIFR [Member] |  |  |  |  |
Disclosure of subsidiaries [Line Items] |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  |  | 100.00%
Proceeds From Sale Of Restricted Investments |  | 385,735 |  |  |
Proceeds from Decommissioning Trust Fund Assets |  | 294,244 |  |  |
Proceed From the issue of Other investment |  | 91,491 |  |  |
Top of range [member] |  |  |  |  |
Disclosure of subsidiaries [Line Items] |  |  |  |  |
Contingent consideration recognised as of acquisition date |  |  | $ 42,805 |  |
USIFR [Member] |  |  |  |  |
Disclosure of subsidiaries [Line Items] |  |  |  |  |
Consideration paid in cash for shares |  | 10,800,558 | 368,753 |  |
Arrangement for contingent consideration by making deposit to trust fund |  | $ 294,244 | $ 10,122 |  |
UGPL [Member] |  |  |  |  |
Disclosure of subsidiaries [Line Items] |  |  |  |  |
Number of shares issued | shares |  |  | 25,940 |  |
FAFG [Member] |  |  |  |  |
Disclosure of subsidiaries [Line Items] |  |  |  |  |
Percentage of Ownership (%) |  | 100.00% | 100.00% |  |
Percentage of voting equity interests acquired |  |  |  | 100.00% |

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