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Bonds Payable - Summary of Bonds Payable (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Disclosure of detailed information about borrowings [line items]      
Bonds payable $ 47,850,324 $ 1,557,121 $ 52,267,337
Noncurrent portion 42,851,353 1,394,447 42,364,627
Less: current portion of bonds payable 4,998,971 162,674 9,902,710
Cost [member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable 48,244,760 1,569,956 52,692,581
Cost [member] | Repayable at maturity in January 2023 [member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable 2,000,000 65,083 2,000,000
Cost [member] | Repayable at maturity in January 2024 [member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable 4,300,000 139,928 4,300,000
Cost [member] | Repayable at maturity in April 2024 [Member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable 6,500,000 211,520 6,500,000
Cost [member] | Repayable at maturity in April 2026 [Member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable 3,500,000 113,895 3,500,000
Cost [member] | Repayable at maturity in April 2025 [Member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable 10,000,000 325,415 10,000,000
Cost [member] | Repayable at maturity in October 2024 [Member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable 3,102,400 100,957 3,102,400
Cost [member] | Repayable at maturity in August 2023 [Member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable 3,000,000 97,624 3,000,000
Cost [member] | Repayable at maturity in August 2025 [Member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable 5,000,000 162,707 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 65,083 2,000,000
Cost [member] | Repayable at Maturity in March 2027 [Member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable 8,842,360 287,744 3,385,381
Cost [member] | Redeemed in September 2022 [Member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable 0 0 6,204,800
Cost [member] | Redeemed in January 2022 [Member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable 0 0 3,700,000
Discounts on bonds payable [member]      
Disclosure of detailed information about borrowings [line items]      
Bonds payable $ 394,436 $ 12,835 $ 425,244