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Lease Arrangements (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure Of Quantitative Information About Leases For Lessee [Abstract] |
Summary of Right-of-use Assets | a.Right-of-use Assets
|  | December 31, 2019 |
|  | NT$ |
|  | (In Millions) |
Land and buildings |  |  |  |
Handsets base stations |  | $ | 6,845 |
Others |  |  | 1,916 |
Equipment |  |  | 2,603 |
|  | $ | 11,364 |
|  | Year Ended December 31, 2019 |
|  | NT$ |
|  | (In Millions) |
Additions to right-of-use assets |  | $ | 3,803 |
Depreciation charge for right-of-use assets |  |  |  |
Land and buildings |  |  |  |
Handsets base stations |  | $ | 2,728 |
Others |  |  | 821 |
Equipment |  |  | 419 |
|  | $ | 3,968 |
Summary of Lease Liabilities | b.Lease liabilities
|  | December 31, 2019 |
|  | NT$ |
|  | (In Millions) |
Lease liabilities |  |  |  |
Current |  | $ | 3,291 |
Non-current |  |  | 6,467 |
|  | $ | 9,758 |
Summary of Range of Discount Rate for Lease Liabilities | Range of discount rate for lease liabilities is as follows:
|  | December 31, 2019
Land and buildings |  |
Handsets base stations |  | 0.58%-1.18%
Others |  | 0.58%-9.00%
Equipment |  | 0.58%-4.50%
Summary of Future Aggregate Lease Collection under Operating Lease for Freehold Plant, Property and Equipment | The future aggregate minimum lease payments under non-cancellable operating leases are as follows: 2018
|  | December 31, 2018 |
|  | NT$ |
|  | (In Millions) |
Within one year |  | $ | 3,439 |
Longer than one year but within five years |  |  | 6,375 |
Longer than five years |  |  | 744 |
|  | $ | 10,558 |
The future aggregate minimum lease collection under non-cancellable operating leases is as follows:
|  | December 31, 2018 |
|  | NT$ |
|  | (In Millions) |
Within one year |  | $ | 344 |
Longer than one year but within five years |  |  | 580 |
Longer than five years |  |  | 206 |
|  | $ | 1,130 |
2019 The future aggregate lease collection under operating lease for investment properties is as follows:
|  | December 31, 2019 |
|  | NT$ |
|  | (In Millions) |
Year 1 |  | $ | 113 |
Year 2 |  |  | 91 |
Year 3 |  |  | 71 |
Year 4 |  |  | 61 |
Year 5 |  |  | 39 |
Onwards |  |  | 96 |
|  | $ | 471 |
Summary of Total Cash Outflow for Leases | 2019
|  | Year Ended December 31, 2019 |
|  | NT$ |
|  | (In Millions) |
Expenses relating to low-value asset leases |  | $ | 7 |
Expenses relating to variable lease payments not included in the measurement of lease liabilities |  | $ | 6 |
Total cash outflow for leases |  | $ | 3,826 |

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- Definition Disclosure of significant unobservable inputs used in fair value measurement of lease liabilities. + References No definition available. + Details
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- Definition The disclosure of additional information about leasing activities of a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 59 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_59&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The disclosure of a maturity analysis of operating lease payments. 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 2019-01-01 -Paragraph 97 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_97&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The disclosure of quantitative information about right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 53 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53&doctype=Standard -URIDate 2019-03-27 + Details
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