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Share-based Payment Arrangements - Summary of ASE Inc. Option Plans Outstanding Share Options (Detail) - $ / shares | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
ASE Inc. option plans [member] | Fifth share options exercise price [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Range of Exercise Price Per Share | $ 73 | $ 73
Weighted Average Remaining Contractual Life (Years) | 8 months 12 days | 1 year 8 months 12 days
The Company Option Plans [member] | First share options exercise price [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Range of Exercise Price Per Share | $ 42.7 | $ 44.1
Weighted Average Remaining Contractual Life (Years) | 3 years 10 months 24 days | 4 years 10 months 24 days
The Company Option Plans [member] | Second share options exercise price [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Range of Exercise Price Per Share | $ 103.5 | $ 107
Weighted Average Remaining Contractual Life (Years) | 8 years 7 months 6 days | 9 years 7 months 6 days

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