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Financial Instruments - Remaining Contractual Maturity for Non-derivative Financial Liabilities (Detail) - TWD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Non-derivative financial liabilities | $ 78,032 | $ 80,027
Less Than 1 Month [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Non-derivative financial liabilities | 37,930 | 39,904
1-3 Months [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Non-derivative financial liabilities | 15 | 300
3 Months to 1 Year [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Non-derivative financial liabilities | 4,278 | 2,566
1-5 Years [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Non-derivative financial liabilities | 31,109 | 28,457
More Than 5 Years [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Non-derivative financial liabilities | 4,700 | 8,800
Non-interest bearing [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 45,347 | 47,205
Non-interest bearing [Member] | Less Than 1 Month [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 37,930 | 39,904
Non-interest bearing [Member] | 1-3 Months [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 0 | 0
Non-interest bearing [Member] | 3 Months to 1 Year [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 2,108 | 2,144
Non-interest bearing [Member] | 1-5 Years [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 5,309 | 5,157
Non-interest bearing [Member] | More Than 5 Years [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 0 | 0
Floating interest rate instruments [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 2,185 | 2,322
Floating interest rate instruments [Member] | Less Than 1 Month [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 0 | 0
Floating interest rate instruments [Member] | 1-3 Months [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 15 | 300
Floating interest rate instruments [Member] | 3 Months to 1 Year [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 2,170 | 422
Floating interest rate instruments [Member] | 1-5 Years [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 0 | 1,600
Floating interest rate instruments [Member] | More Than 5 Years [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | $ 0 | $ 0
Floating interest rate instruments [Member] | Weighted average [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Interest rates of bank loans | 1.99% | 1.79%
Fixed interest rate instruments [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | $ 30,500 | $ 30,500
Fixed interest rate instruments [Member] | Less Than 1 Month [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 0 | 0
Fixed interest rate instruments [Member] | 1-3 Months [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 0 | 0
Fixed interest rate instruments [Member] | 3 Months to 1 Year [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 0 | 0
Fixed interest rate instruments [Member] | 1-5 Years [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | 25,800 | 21,700
Fixed interest rate instruments [Member] | More Than 5 Years [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Loans | $ 4,700 | $ 8,800
Fixed interest rate instruments [Member] | Weighted average [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Interest rates of bank loans | 0.53% | 0.53%
Fair value interest rate risk [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Financial assets | $ 43,156 | $ 41,593
Financial liabilities | 41,458 | 41,150
Cash flow interest rate risk [Member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Financial assets | 9,136 | 9,631
Financial liabilities | $ 2,185 | $ 2,322

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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35H&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35M&doctype=Standard -URIDate 2023-03-23 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35N&doctype=Standard -URIDate 2023-03-23 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35I&doctype=Standard -URIDate 2023-03-23 + Details
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