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Related Parties Transactions - Additional Information (Detail) $ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2023 SGD ($)
Disclosure of transactions between related parties [Line Items] |  |  |  |
Lease contract value | $ 10,975 | $ 10,673 |  |
Interest on lease liabilities | 105 | 75 | $ 69 |
Next Commercial Bank Co., Ltd. ("NCB") [Member] |  |  |  |
Disclosure of transactions between related parties [Line Items] |  |  |  |
Interest income on deposits | 1 |  |  |
ST-2 Satellite Ventures Pte., Ltd. ("STS") [Member] |  |  |  |
Disclosure of transactions between related parties [Line Items] |  |  |  |
Lease contract value | 1,800 | 1,955 |  |
Interest on lease liabilities | $ 8 | $ 8 | $ 7 |
ST2 Satellite [Member] |  |  |  |
Disclosure of transactions between related parties [Line Items] |  |  |  |
Lease term | 15 years |  |  |
Lease contract value | $ 6,000 |  |  | $ 261
Lease contract value, prepayment amount | $ 3,068 |  |  |
Extended useful life | 3 years 3 months |  |  |
Right-of-use assets acquired | $ 1,125 |  |  |

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- Definition Extended useful life. + References No definition available. + Details
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- Definition Lease contract for a period. + References No definition available. + Details
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- Definition Prepaid rent in related parties. + References No definition available. + Details
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- Definition The amount of interest expense on lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 53 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_b&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of interest income on deposits. [Refer: Interest income] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard -URIDate 2023-03-23 + Details
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- Details
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- Details
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