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Financial Instruments - Summary of Maturity Profile of Financial Liabilities Based on Contractual Undiscounted Payments, Including Principal and Interest (Detail)
$ in Millions, $ in Millions
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Disclosure of detailed information about financial instruments [line items]      
Accrued expenses and other current liabilities $ 451,158.8 $ 13,759.0 $ 296,667.9
Long-term bank loans 31,824.4 $ 970.5 4,383.0
Total non-derivative and derivative financial instruments 1,991,005.8   1,848,565.1
Non-derivative financial liabilities [member]      
Disclosure of detailed information about financial instruments [line items]      
Hedging financial liabilities-bank loans     27,290.4
Accounts payable (including related parties) 74,226.6   57,293.1
Payables to contractors and equipment suppliers 192,635.2   171,484.6
Accrued expenses and other current liabilities 358,165.7   241,118.9
Bonds payable 1,196,693.3   1,135,842.9
Long-term bank loans 35,406.7   6,845.4
Lease liabilities (including those classified under accrued expenses and other current liabilities) 34,887.8   34,847.2
Others 98,716.6   174,400.2
Non-derivative financial liabilities 1,990,731.9   1,849,122.7
Derivative financial instruments [member] | Forward exchange contracts [member]      
Disclosure of detailed information about financial instruments [line items]      
Outflows 109,525.4   64,826.4
Inflows (109,251.5)   (65,384.0)
Derivative financial instruments 273.9   (557.6)
Less than 1 year [member]      
Disclosure of detailed information about financial instruments [line items]      
Total non-derivative and derivative financial instruments 708,180.9   527,072.8
Less than 1 year [member] | Non-derivative financial liabilities [member]      
Disclosure of detailed information about financial instruments [line items]      
Hedging financial liabilities-bank loans     27,290.4
Accounts payable (including related parties) 74,226.6   57,293.1
Payables to contractors and equipment suppliers 192,635.2   171,484.6
Accrued expenses and other current liabilities 358,165.7   241,118.9
Bonds payable 76,460.8   24,890.5
Long-term bank loans 2,935.2   2,371.3
Lease liabilities (including those classified under accrued expenses and other current liabilities) 3,483.5   3,181.6
Non-derivative financial liabilities 707,907.0   527,630.4
Less than 1 year [member] | Derivative financial instruments [member] | Forward exchange contracts [member]      
Disclosure of detailed information about financial instruments [line items]      
Outflows 109,525.4   64,826.4
Inflows (109,251.5)   (65,384.0)
Derivative financial instruments 273.9   (557.6)
1-3 years [member]      
Disclosure of detailed information about financial instruments [line items]      
Total non-derivative and derivative financial instruments 430,290.7   398,388.6
1-3 years [member] | Non-derivative financial liabilities [member]      
Disclosure of detailed information about financial instruments [line items]      
Bonds payable 335,240.8   224,062.9
Long-term bank loans 2,275.6   3,889.0
Lease liabilities (including those classified under accrued expenses and other current liabilities) 5,794.8   5,248.3
Others 86,979.5   165,188.4
Non-derivative financial liabilities 430,290.7   398,388.6
3-5 years [member]      
Disclosure of detailed information about financial instruments [line items]      
Total non-derivative and derivative financial instruments 240,997.8   315,076.4
3-5 years [member] | Non-derivative financial liabilities [member]      
Disclosure of detailed information about financial instruments [line items]      
Bonds payable 197,389.1   303,525.3
Long-term bank loans 27,044.8   585.1
Lease liabilities (including those classified under accrued expenses and other current liabilities) 4,826.8   4,662.9
Others 11,737.1   6,303.1
Non-derivative financial liabilities 240,997.8   315,076.4
More than 5 years [member]      
Disclosure of detailed information about financial instruments [line items]      
Total non-derivative and derivative financial instruments 611,536.4   608,027.3
More than 5 years [member] | Non-derivative financial liabilities [member]      
Disclosure of detailed information about financial instruments [line items]      
Bonds payable 587,602.6   583,364.2
Long-term bank loans 3,151.1    
Lease liabilities (including those classified under accrued expenses and other current liabilities) 20,782.7   21,754.4
Others     2,908.7
Non-derivative financial liabilities $ 611,536.4   $ 608,027.3