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Share-based Payment Arrangements - Additional Information (Detail) $ / shares in Units, $ / shares in Units, $ in Thousands, $ in Thousands |  |  |  | 1 Months Ended | 12 Months Ended |
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Sep. 06, 2024 shares | Oct. 01, 2021 shares | May 31, 2021 shares | Jan. 31, 2024 shares | Nov. 30, 2023 shares | Oct. 31, 2023 shares | Sep. 30, 2023 | Sep. 30, 2020 shares | Nov. 30, 2019 shares | Dec. 31, 2024 TWD ($) shares $ / shares | Dec. 31, 2024 USD ($) shares $ / shares | Dec. 31, 2023 TWD ($) $ / shares | Dec. 31, 2023 TWD ($) shares $ / shares | Dec. 31, 2022 TWD ($) $ / shares | Dec. 31, 2022 TWD ($) shares $ / shares | Dec. 31, 2024 USD ($)
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  |  | 10 years | 10 years |  |  |  |  |
Number of shares granted |  |  | 10,000,000 |  |  | 14,506,000 |  | 1,140,000 | 17,167,000 |  |  |  |  |  |  |
Compensation cost of employee share options |  |  |  |  |  |  |  |  |  | $ 2,188,600 | $ 66,746 |  | $ 742,890 |  | $ 989,843 |
Number of employee restricted stock award granted | 16,500,000 | 15,000,000 |  | 5,722,000 | 372,000 |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments forfeited in share-based payment arrangement |  |  |  |  |  |  |  |  |  | 4,965,000 | 4,965,000 |  |  |  |  |
Employee restricted stock awards plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Par value per share | $ / shares |  |  |  |  |  |  |  |  |  | $ 10 |  |  |  |  |  |
Fair value of the employee restricted stock award | (per share) |  |  |  |  |  |  |  |  |  | 141.5 | $ 4.3 |  | $ 92.4 |  |  |
Exercise price, per share | $ / shares |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |
USISH option plans [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital surplus increased |  |  |  |  |  |  |  |  |  | $ 81,947 |  | $ 90,773 | $ 90,773 | $ 125,049 | $ 125,049 | $ 2,499
Number of employee restricted stock award granted |  |  |  |  |  |  |  |  |  | 5,722,000 | 5,722,000 |  | 372,000 |  | 0 |
Number of other equity instruments forfeited in share-based payment arrangement |  |  |  |  |  |  |  |  |  | 3,175,000 | 3,175,000 |  | 18,000 |  | 1,182,000 |
Weighted average share price for share options in share-based payment arrangement exercised during period at date of exercise | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 14.8 | $ 14.9 |  | $ 15.4 |  |
USISH option plans [member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  | 3.0 |  |  |  |  |  |  |
USISH option plans [member] | Weighted average [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  | 4.0 |  |  |  |  |  |  |
USISH option plans [member] | Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  | 5.0 |  |  |  |  |  |  |
ASE Inc. option plans [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share option to purchase of ordinary shares |  |  |  |  |  |  |  |  |  | 0.5 | 0.5 |  |  |  |  |
Weighted average exercise price of share options | (per share) |  |  |  |  |  |  |  |  |  | $ 151.7 | $ 4.6 |  | $ 112.4 |  | $ 92.4 |
USISH second share option plan [member] | Phase One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  |  | 1.2 years | 1.2 years |  |  |  |  |
USISH second share option plan [member] | Phase Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  |  | 2.2 years | 2.2 years |  |  |  |  |
USISH second share option plan [member] | Phase Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  |  | 3.2 years | 3.2 years |  |  |  |  |
USISH second share option plan [member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  |  | 2.2 years | 2.2 years |  |  |  |  |
USISH second share option plan [member] | Weighted average [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  |  | 3.2 years | 3.2 years |  |  |  |  |
USISH second share option plan [member] | Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  |  | 4.2 years | 4.2 years |  |  |  |  |
USISH Core Employees Restricted Share Plan Two Thousand and Twenty Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |
USISH Core Employees Restricted Share Plan Two Thousand and Twenty Three [Member] | Phase One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period of lock in of ordinary shares to be issued upon satisfaction of performance conditions |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |
USISH Core Employees Restricted Share Plan Two Thousand and Twenty Three [Member] | Phase Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period of lock in of ordinary shares to be issued upon satisfaction of performance conditions |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |
USISH Two Thousand and Twenty and Twenty Three Share Options Plan [Member] | Phase One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  |  | 1 | 1 |  |  |  |  |
USISH Two Thousand and Twenty and Twenty Three Share Options Plan [Member] | Phase Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  |  | 2 | 2 |  |  |  |  |
USISH Two Thousand and Twenty and Twenty Three Share Options Plan [Member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  |  | 2 | 2 |  |  |  |  |
USISH Two Thousand and Twenty and Twenty Three Share Options Plan [Member] | Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  |  |  |  |  |  |  |  | 3 | 3 |  |  |  |  |
AMPI Option Plans [Member] | Share Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valid term of share option plans |  |  | 10 |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The description of the maximum term of options granted for a type of share-based payment arrangement that existed at any time during the period. An entity with substantially similar types of share-based payment arrangements may aggregate this information. [Refer: Types of share-based payment arrangements [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2024-01-01 -Paragraph 45 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_a&doctype=Standard -URIDate 2024-03-27 + Details
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