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Related Parties Transactions - Details of Transactions Between the Company and Other Related Parties (Detail) $ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2023 USD ($)
Disclosure of transactions between related parties [Line Items] |  |  |  |
Revenues | $ 460 | $ 478 | $ 554 |
Operating Costs and Expenses | 1,396 | 1,327 | 927 |
Non-operating Income and Expenses | 40 | 39 | 41 |
Receivables | 78 | 75 |  | $ 3
Payables to related parties | 385 | 539 |  | $ 13
Customers' deposits | 20 | 69 |  |
Associates [Member] |  |  |  |
Disclosure of transactions between related parties [Line Items] |  |  |  |
Revenues | 403 | 417 | 499 |
Operating Costs and Expenses | 1,322 | 1,247 | 853 |
Non-operating Income and Expenses | 38 | 37 | 38 |
Receivables | 76 | 70 |  |
Payables to related parties | 381 | 534 |  |
Customers' deposits | 20 | 69 |  |
Acquisition of property, plant and equipment | 173 | 32 | 398 |
Acquisition of intangible assets | 0 | 1 | 0 |
Proceeds | 0 | 0 | 10 |
Gain on Disposal | 0 | 0 | 2 |
Others [Member] |  |  |  |
Disclosure of transactions between related parties [Line Items] |  |  |  |
Revenues | 57 | 61 | 55 |
Operating Costs and Expenses | 74 | 80 | 74 |
Non-operating Income and Expenses | 2 | 2 | $ 3 |
Receivables | 2 | 5 |  |
Payables to related parties | 4 | 5 |  |
Customers' deposits | $ 0 | $ 0 |  |

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- Definition Non-operating income and expenses in related parties. + References No definition available. + Details
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- Definition Operating costs and expenses in related parties. + References No definition available. + Details
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- Definition Proceeds from disposal of property, plant and equipment. + References No definition available. + Details
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- Definition The gain on the disposal of property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 98 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_98_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of property and other assets purchased by the entity in related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2023-01-01 -Paragraph 21 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2023-en-r&anchor=para_21_b&doctype=Standard -URIDate 2023-03-23 + Details
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