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Contents of Significant Accounts - Cash and Cash Equivalents (Detail) $ in Thousands, $ in Thousands	Dec. 31, 2023 TWD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 TWD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 TWD ($)	Dec. 31, 2020 TWD ($)
Cash And Cash Equivalents [Abstract]
Cash on hand and petty cash	$ 6,200		$ 6,023
Checking and savings accounts	50,322,942		42,422,443
Time deposits	80,276,114		125,467,386
Repurchase agreements collateralized by government bonds and corporate notes	1,948,359		5,922,925
Total	$ 132,553,615	$ 4,328,988	$ 173,818,777	$ 5,676,642	$ 132,622,131	$ 94,048,036

X

- Definition

The amount of cash balances held at banks.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2023-01-01
-Paragraph 45
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X

- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References

No definition available.

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- Definition

The amount of cash held by the entity. This does not include demand deposits.

+ References

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- Definition

The amount of instruments purchased for resale in reverse repurchase agreements and cash collateral on securities borrowed. [Refer: Repurchase agreements and cash collateral on securities lent]

+ References

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- Definition

A classification of cash equivalents representing short-term deposits. [Refer: Cash equivalents]

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