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Contents of Significant Accounts - Summary of Balances of Contract Assets and Contract Liabilities (Detail) $ in Thousands, $ in Thousands	Dec. 31, 2023 TWD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 TWD ($)	Jan. 01, 2022 TWD ($)
Disclosure of balances of contract assets and contract liabilities [line items]
Contract assets, current	$ 739,528		$ 373,318	$ 319,621
Contract liabilities, current	3,250,712	$ 106,163	3,546,815	3,441,754
Contract liabilities, non-current	430,640	$ 14,064	438,188	641,386
Contract liabilities	3,681,352		3,985,003	4,083,140
Sales of Goods and Services [member]
Disclosure of balances of contract assets and contract liabilities [line items]
Contract assets, current	1,132,477		766,691	677,326
Contract liabilities	3,681,352		3,985,003	4,083,140
Loss allowance [member]
Disclosure of balances of contract assets and contract liabilities [line items]
Contract assets, current	$ (392,949)		$ (393,373)	$ (357,705)

X

- Definition

The amount of an entity’s obligation to transfer goods or services to a customer for which the entity has received consideration (or the amount is due) from the customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2023-01-01
-Paragraph 105
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_105&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2023-01-01
-Paragraph 116
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+ Details

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Period Type:	instant

X

- Definition

The amount of current contract liabilities. [Refer: Contract liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2023-01-01
-Paragraph 105
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_105&doctype=Standard
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X

- Definition

The amount of non-current contract liabilities. [Refer: Contract liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Number 15
-IssueDate 2023-01-01
-Paragraph 105
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_105&doctype=Standard
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X

- Definition

Contract assets, current.

+ References

No definition available.

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X

- Definition

Disclosure of balances of contract assets and contract liabilities.

+ References

No definition available.

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