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Assets Pledged as Collateral or for Security - Summary of Assets Pledged as Collateral or for Security (Detail) $ in Thousands, $ in Thousands	Dec. 31, 2021 TWD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 TWD ($)
Assets Pledged As Collateral or For Security [abstract]
Inventories related to real estate business	$ 2,587,110	$ 93,263	$ 10,564,873
Property, plant and equipment	114,390	4,124	124,124
Investment properties	20,796,862	749,707	11,847,145
Other financial assets (including current and non-current)	444,358	16,018	460,890
Total	$ 23,942,720	$ 863,112	$ 22,997,032

X

- Definition

Assets pledged as collateral or for security.

+ References

No definition available.

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- Definition

Investment properties pledged as security.

+ References

No definition available.

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X

- Definition

The fair value of collateral held that is permitted to be sold or repledged in the absence of default by the owner of the collateral. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2021-01-01
-Paragraph 15
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_15_a&doctype=Standard
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X

- Definition

The amount of inventories pledged as security for liabilities. [Refer: Inventories]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 2
-IssueDate 2021-01-01
-Paragraph 36
-Subparagraph h
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- Definition

The amount of non-cash collateral assets (such as debt or equity instruments) provided to a transferee, for which the transferee has the right by contract or custom to sell or repledge the collateral.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 9
-IssueDate 2021-01-01
-Paragraph 3.2.23
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2023-01-01
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-IssueDate 2021-01-01
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- Definition

The amount of property, plant and equipment pledged as security for liabilities. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2021-01-01
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