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Operating Segments Information - Geographic Information (Detail) - TWD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Disclosure of geographical areas [line items] |  |
Non-current Assets | $ 2,037,267.0 | $ 1,613,496.7
Taiwan [member] |  |
Disclosure of geographical areas [line items] |  |
Non-current Assets | 1,953,007.7 | 1,569,080.4
United States [member] |  |
Disclosure of geographical areas [line items] |  |
Non-current Assets | 41,208.7 | 9,455.5
China [member] |  |
Disclosure of geographical areas [line items] |  |
Non-current Assets | 41,895.2 | 34,456.4
Europe, the Middle East and Africa [member] |  |
Disclosure of geographical areas [line items] |  |
Non-current Assets | 143.9 | 174.2
Japan [member] |  |
Disclosure of geographical areas [line items] |  |
Non-current Assets | 1,011.0 | 327.2
Others [member] |  |
Disclosure of geographical areas [line items] |  |
Non-current Assets | $ 0.5 | $ 3.0

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of non-current assets other than financial instruments, deferred tax assets, post-employment benefit assets and rights arising under insurance contracts. [Refer: Deferred tax assets; Financial instruments, class [member]; Non-current assets; Types of insurance contracts [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2021-01-01 -Paragraph 33 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2021-en-r&anchor=para_33_b&doctype=Standard -URIDate 2021-03-24 + Details
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