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Retirement Benefit Plans - Summary of Maturity Analysis of Undiscounted Pension Benefit (Detail) $ in Thousands, $ in Thousands | Dec. 31, 2022 TWD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 TWD ($)
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Disclosure of defined benefit plans [line items] |  |  |
Maturity analysis of undiscounted pension benefit | $ 13,337,318 | $ 434,017 | $ 15,755,564
Less than 1 year [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Maturity analysis of undiscounted pension benefit | 646,243 | 21,030 | 561,812
1-5 years [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Maturity analysis of undiscounted pension benefit | 2,760,990 | 89,847 | 2,593,560
More than 5 years [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Maturity analysis of undiscounted pension benefit | $ 9,930,085 | $ 323,140 | $ 12,600,192

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- Definition The present value of the expected payments by a retirement benefit plan to existing and past employees, attributable to the service already rendered. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 26 -IssueDate 2022-03-24 -Paragraph 35 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=26&code=ifrs-tx-2022-en-r&anchor=para_35_d&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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- Details
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