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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) $ in Millions, $ in Millions	Dec. 31, 2024 TWD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 TWD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 TWD ($)	Dec. 31, 2021 TWD ($)
Cash
Cash on hand	$ 444		$ 404
Bank deposits	13,243		9,522
Cash	13,687		9,926
Cash equivalents (with maturities of less than three months)
Commercial paper	16,887		14,496
Negotiable certificates of deposit	2,800		5,900
Time deposits	2,884		3,502
Stimulus Vouchers	2		0
Cash equivalents	22,573		23,898
Cash and cash equivalents	$ 36,260	$ 1,106	$ 33,824	$ 1,032	$ 50,193	$ 39,779

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Negotiable certificates of deposit amount.

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Stimulus vouchers.

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Time deposits with banks that have specified date of maturity.

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- Definition

The amount of cash balances held at banks.

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The amount of cash on hand and demand deposits. [Refer: Cash on hand]

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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]

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

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

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