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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, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Disclosure of detailed information about financial instruments [line items]      
Accrued expenses and other current liabilities $ 296,667.9 $ 9,688.7 $ 293,171.0
Long-term bank loans 4,383.0 $ 143.1 4,760.0
Total non-derivative and derivative financial instruments 1,848,565.1   1,782,877.2
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) 57,293.1   56,522.3
Payables to contractors and equipment suppliers 171,484.6   213,499.6
Accrued expenses and other current liabilities 241,118.9   219,588.0
Bonds payable 1,135,842.9   1,074,799.0
Long-term bank loans 6,845.4   6,171.8
Lease liabilities (including those classified under accrued expenses and other current liabilities) 34,847.2   35,710.8
Others 174,400.2   177,568.4
Non-derivative financial liabilities 1,849,122.7   1,783,859.9
Derivative financial instruments [member] | Forward exchange contracts [member]      
Disclosure of detailed information about financial instruments [line items]      
Outflows 64,826.4   103,617.4
Inflows (65,384.0)   (104,600.1)
Derivative financial instruments (557.6)   (982.7)
Less than 1 year [member]      
Disclosure of detailed information about financial instruments [line items]      
Total non-derivative and derivative financial instruments 527,072.8   527,574.1
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) 57,293.1   56,522.3
Payables to contractors and equipment suppliers 171,484.6   213,499.6
Accrued expenses and other current liabilities 241,118.9   219,588.0
Bonds payable 24,890.5   34,668.9
Long-term bank loans 2,371.3   1,278.1
Lease liabilities (including those classified under accrued expenses and other current liabilities) 3,181.6   2,999.9
Non-derivative financial liabilities 527,630.4   528,556.8
Less than 1 year [member] | Derivative financial instruments [member] | Forward exchange contracts [member]      
Disclosure of detailed information about financial instruments [line items]      
Outflows 64,826.4   103,617.4
Inflows (65,384.0)   (104,600.1)
Derivative financial instruments (557.6)   (982.7)
1-3 years [member]      
Disclosure of detailed information about financial instruments [line items]      
Total non-derivative and derivative financial instruments 398,388.6   270,036.8
1-3 years [member] | Non-derivative financial liabilities [member]      
Disclosure of detailed information about financial instruments [line items]      
Bonds payable 224,062.9   94,869.1
Long-term bank loans 3,889.0   3,533.2
Lease liabilities (including those classified under accrued expenses and other current liabilities) 5,248.3   5,367.8
Others 165,188.4   166,266.7
Non-derivative financial liabilities 398,388.6   270,036.8
3-5 years [member]      
Disclosure of detailed information about financial instruments [line items]      
Total non-derivative and derivative financial instruments 315,076.4   336,844.5
3-5 years [member] | Non-derivative financial liabilities [member]      
Disclosure of detailed information about financial instruments [line items]      
Bonds payable 303,525.3   320,211.5
Long-term bank loans 585.1   1,360.5
Lease liabilities (including those classified under accrued expenses and other current liabilities) 4,662.9   4,754.0
Others 6,303.1   10,518.5
Non-derivative financial liabilities 315,076.4   336,844.5
More than 5 years [member]      
Disclosure of detailed information about financial instruments [line items]      
Total non-derivative and derivative financial instruments 608,027.3   648,421.8
More than 5 years [member] | Non-derivative financial liabilities [member]      
Disclosure of detailed information about financial instruments [line items]      
Bonds payable 583,364.2   625,049.5
Lease liabilities (including those classified under accrued expenses and other current liabilities) 21,754.4   22,589.1
Others 2,908.7   783.2
Non-derivative financial liabilities $ 608,027.3   $ 648,421.8