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Bonds Payable - Summary of Bonds Payable (Detail) $ in Thousands, $ in Thousands | Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($)
--- | --- | --- | ---
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | $ 32,976,164 | $ 1,005,678 | $ 45,009,486
Less: current portion of bonds payable | 14,997,976 | 457,395 | 24,520,052
Noncurrent portion | 17,978,188 | 548,283 | 20,489,434
Cost [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 32,717,010 | 997,774 | 45,093,247
Cost [member] | Repayable at maturity in January 2024 [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 0 | 0 | 4,300,000
Cost [member] | Repayable at maturity in April 2024 [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 0 | 0 | 6,500,000
Cost [member] | Repayable at maturity in April 2026 [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 3,500,000 | 106,740 | 3,500,000
Cost [member] | Repayable at maturity in April 2025 [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 10,000,000 | 304,971 | 10,000,000
Cost [member] | Repayable at maturity in August 2025 [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 5,000,000 | 152,486 | 5,000,000
Cost [member] | Repayable at maturity in August 2027 [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 2,000,000 | 60,994 | 2,000,000
Cost [member] | Repayable at maturity in October 2024 [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 0 | 0 | 3,102,400
Cost [member] | Repayable at Maturity in March 2027 [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 12,217,010 | 372,583 | 10,690,847
Premiums (Discounts) on Bonds Payable [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Add (Less): premiums (discounts) on bonds payable | $ 259,154 | $ 7,904 | $ (83,761)

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