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Lease Arrangements - Right-of-use Assets (Detail) - 12 months ended Dec. 31, 2019 $ in Millions, $ in Millions | TWD ($) | USD ($)
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Disclosure of quantitative information about right-of-use assets [line items] |  |
Right-of-use assets | $ 17,232.4 | $ 576.1
Additions to right-of-use assets | 1,033.0 |
Depreciation of right-of-use assets | 2,622.7 |
Income from subleasing right-of-use assets | 55.0 |
Land [member] |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |
Right-of-use assets | 14,064.0 |
Depreciation of right-of-use assets | 957.1 |
Buildings [member] |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |
Right-of-use assets | 2,351.8 |
Depreciation of right-of-use assets | 458.8 |
Machinery and equipment [member] |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |
Right-of-use assets | 775.8 |
Depreciation of right-of-use assets | 1,184.4 |
Office equipment [member] |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |
Right-of-use assets | 40.8 |
Depreciation of right-of-use assets | $ 22.4 |

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- Definition The amount of additions to 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 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_h&doctype=Standard -URIDate 2019-03-27 + Details
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Period Type: | duration

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- Definition The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 53 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of income from subleasing right-of-use assets. Sublease is a transaction for which an underlying asset is re-leased by a lessee (‘intermediate lessor’) to a third party, and the lease (‘head lease’) between the head lessor and lessee remains in effect. [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 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_f&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 53 -Subparagraph j -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_j&doctype=Standard -URIDate 2019-03-27 + Details
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- Details
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- Details
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- Details
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- Details
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