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v3.21.1

Related Parties Transactions - Details of Transactions Between the Company and Other Related Parties (Detail) $ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 TWD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 TWD ($) | Dec. 31, 2018 TWD ($) | Dec. 31, 2020 USD ($)
Disclosure of transactions between related parties [Line Items] |  |  |  |  |
Revenues | $ 1,574 |  | $ 350 | $ 438 |
Operating Costs and Expenses | 783 |  | 1,040 | 1,379 |
Non-operating Income and Expenses | 40 |  | 45 | 31 |
Receivables | 230 |  | 17 |  | $ 8
Payables | 646 |  | 654 |  | $ 24
Acquisition of property, plant and equipment | 375 |  | 242 | 312 |
Proceeds from disposal of property, plant and equipment | 319 | $ 11 | 48 | 264 |
Prepaid rents - current |  |  |  | 205 |
Prepaid rents - noncurrent |  |  |  | 1,346 |
Prepaid rents |  |  |  | 1,551 |
Associates [Member] |  |  |  |  |
Disclosure of transactions between related parties [Line Items] |  |  |  |  |
Revenues | 1,508 |  | 274 | 344 |
Operating Costs and Expenses | 715 |  | 964 | 1,304 |
Non-operating Income and Expenses | 37 |  | 41 | 31 |
Receivables | 229 |  | 10 |  |
Contract liabilities-current | 183 |  | 0 |  |
Payables | 643 |  | 651 |  |
Customers' deposits | 5 |  | 8 |  |
Acquisition of property, plant and equipment | 375 |  | 242 | 312 |
Others [Member] |  |  |  |  |
Disclosure of transactions between related parties [Line Items] |  |  |  |  |
Revenues | 66 |  | 76 | 94 |
Operating Costs and Expenses | 68 |  | 76 | 75 |
Non-operating Income and Expenses | 3 |  | 4 | $ 0 |
Receivables | 1 |  | 7 |  |
Payables | 3 |  | 3 |  |
Proceeds from disposal of property, plant and equipment | 386 |  | $ 0 |  |
Gain on Disposal | $ 310 |  |  |  |

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- Definition Current prepaid rent in related parties. + References No definition available. + Details
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- Definition Non-operating income and expenses in related parties. + References No definition available. + Details
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- Definition Non current prepaid rent in related parties. + 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 2020-01-01 -Paragraph 98 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_98_c&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph 21 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2020-en-r&anchor=para_21_b&doctype=Standard -URIDate 2020-01-01 + Details
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