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v3.25.1

Property, Plant and Equipment - Summary of Property, Plant and Equipment - Assets Subject to Operating Leases (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($)
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Beginning balance | $ 292,338 |  |  |
Depreciation expenses | (28,707) |  | $ (28,839) | $ (28,760)
Impairment losses | 0 | $ 0 | 299 | 0
Ending balance | 289,840 | $ 8,839 | 292,338 |
Property, plant and equipment subject to operating leases [member] |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Beginning balance | 7,253 |  | 6,199 |
Ending balance | 5,125 |  | 7,253 | 6,199
Gross carrying amount [Member] | Property, plant and equipment subject to operating leases [member] |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Beginning balance | 9,055 |  | 7,561 | 8,943
Additions | 1 |  | 4 | 0
Others | (2,214) |  | 1,490 | (1,382)
Ending balance | 6,842 |  | 9,055 | 7,561
Accumulated depreciation, amortization and impairment [Member] | Property, plant and equipment subject to operating leases [member] |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Beginning balance | (1,802) |  | (1,362) | (1,692)
Depreciation expenses | (65) |  | (73) | (59)
Others | 150 |  | (367) | 389
Ending balance | (1,717) |  | (1,802) | (1,362)
Land [Member] | Property, plant and equipment subject to operating leases [member] |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Beginning balance | 4,924 |  | 4,376 |
Ending balance | 3,104 |  | 4,924 | 4,376
Land [Member] | Gross carrying amount [Member] | Property, plant and equipment subject to operating leases [member] |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Beginning balance | 4,924 |  | 4,376 | 4,809
Additions | 0 |  | 0 | 0
Others | (1,820) |  | 548 | (433)
Ending balance | 3,104 |  | 4,924 | 4,376
Land [Member] | Accumulated depreciation, amortization and impairment [Member] | Property, plant and equipment subject to operating leases [member] |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Beginning balance | 0 |  | 0 | 0
Depreciation expenses | 0 |  | 0 | 0
Others | 0 |  | 0 | 0
Ending balance | 0 |  | 0 | 0
Buildings [Member] | Property, plant and equipment subject to operating leases [member] |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Beginning balance | 2,329 |  | 1,823 |
Ending balance | 2,021 |  | 2,329 | 1,823
Buildings [Member] | Gross carrying amount [Member] | Property, plant and equipment subject to operating leases [member] |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Beginning balance | 4,131 |  | 3,185 | 4,134
Additions | 1 |  | 4 | 0
Others | (394) |  | 942 | (949)
Ending balance | 3,738 |  | 4,131 | 3,185
Buildings [Member] | Accumulated depreciation, amortization and impairment [Member] | Property, plant and equipment subject to operating leases [member] |  |  |  |
Disclosure Of Property Plant And Equipment [Line Items] |  |  |  |
Beginning balance | (1,802) |  | (1,362) | (1,692)
Depreciation expenses | (65) |  | (73) | (59)
Others | 150 |  | (367) | 389
Ending balance | $ (1,717) |  | $ (1,802) | $ (1,362)

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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -Clause v -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_v&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 98 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_98_a&doctype=Standard -URIDate 2024-03-27 + Details
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