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Net Income - Interest Expenses (Detail) $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 TWD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 TWD ($)	Dec. 31, 2021 TWD ($)
Interest costs [abstract]
Interest on bonds payable	$ 168		$ 161	$ 132
Interest on lease liabilities	105		75	69
Interest paid to financial institutions	44		26	16
Others	2		1	1
Interest expenses	$ 319	$ 10	$ 263	$ 218

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- Definition

Interest paid to financial institutions.

+ References

No definition available.

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- Definition

The amount of expense arising from interest.

+ References

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- Definition

The amount of interest expense on bonds issued. [Refer: Interest expense; Bonds issued]

+ References

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The amount of interest expense on lease liabilities. [Refer: Lease liabilities]

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The amount of interest expense on other financial liabilities. [Refer: Interest expense; Other financial liabilities]

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