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Investment Properties - Schedule of Future Aggregate Lease Collection Under Operating Lease for Investment Properties (Detail) - TWD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure Of Maturity Analysis Of Operating Lease Payments [Line Items] |  |
Aggregate lease collection under operating lease | $ 1,082 | $ 570
Year 1 [Member] |  |
Disclosure Of Maturity Analysis Of Operating Lease Payments [Line Items] |  |
Aggregate lease collection under operating lease | 168 | 118
Year 2 [Member] |  |
Disclosure Of Maturity Analysis Of Operating Lease Payments [Line Items] |  |
Aggregate lease collection under operating lease | 157 | 99
Year 3 [Member] |  |
Disclosure Of Maturity Analysis Of Operating Lease Payments [Line Items] |  |
Aggregate lease collection under operating lease | 134 | 90
Year 4 [Member] |  |
Disclosure Of Maturity Analysis Of Operating Lease Payments [Line Items] |  |
Aggregate lease collection under operating lease | 105 | 70
Year 5 [Member] |  |
Disclosure Of Maturity Analysis Of Operating Lease Payments [Line Items] |  |
Aggregate lease collection under operating lease | 83 | 44
Onwards [Member] |  |
Disclosure Of Maturity Analysis Of Operating Lease Payments [Line Items] |  |
Aggregate lease collection under operating lease | $ 435 | $ 149

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- Definition The amount of undiscounted operating lease payments to be received. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 97 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_97&doctype=Standard -URIDate 2023-03-23 + Details
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