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Business Combinations - Summary of Net Cash Outflow (Inflow) on Acquisition of Subsidiary (Detail) $ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 TWD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 USD ($)
Disclosure of detailed information about business combination [Line Items] |  |  |  |
Net cash outflow (inflow) on acquisition of subsidiaries | $ 966,000 |  |  |
AMPI [member] |  |  |  |
Disclosure of detailed information about business combination [Line Items] |  |  |  |
Total consideration |  | $ 250,000 |  |
Less: Cash and cash equivalent acquired |  | (349,496) |  |
Net cash outflow (inflow) on acquisition of subsidiaries |  | (99,496) |  |
ASEEE [member] |  |  |  |
Disclosure of detailed information about business combination [Line Items] |  |  |  |
Total consideration |  | 0 |  |
Less: Cash and cash equivalent acquired |  | (23,197) |  |
Net cash outflow (inflow) on acquisition of subsidiaries |  | (23,197) |  |
USIPL [member] |  |  |  |
Disclosure of detailed information about business combination [Line Items] |  |  |  |
Total consideration |  | 313,057 |  |
Less: Cash and cash equivalent acquired |  | (108,718) |  |
Net cash outflow (inflow) on acquisition of subsidiaries |  | 204,339 |  |
FAFG [member] |  |  |  |
Disclosure of detailed information about business combination [Line Items] |  |  |  |
Total consideration |  | 12,443,637 |  |
Total consideration |  | 11,094,802 |  |
Less: Cash and cash equivalent acquired |  | (2,349,164) |  |
Net cash outflow (inflow) on acquisition of subsidiaries |  | 8,745,638 |  |
ITGEU |  |  |  |
Disclosure of detailed information about business combination [Line Items] |  |  |  |
Total consideration |  | 50,368 |  | $ 1,816
Less: Cash and cash equivalent acquired |  | (68,719) | $ (2,477) |
Net cash outflow (inflow) on acquisition of subsidiaries |  | (18,351) | (661) |
SER [Member] |  |  |  |
Disclosure of detailed information about business combination [Line Items] |  |  |  |
Total consideration |  | 217,919 |  | $ 7,856
Less: Cash and cash equivalent acquired |  | (18,850) | (680) |
Net cash outflow (inflow) on acquisition of subsidiaries |  | $ 199,069 | $ 7,176 |

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- Definition The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2021-01-01 -Paragraph B64 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B64_f&doctype=Appendix&subtype=B -URIDate 2021-03-24 + Details
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