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Investments Accounted for Using Equity Method (Tables)

12 Months Ended

Dec. 31, 2024

Texts Block [Abstract]

Summary of Investments in Associates

Associates consisted of the following:

				Place of				Carrying Amount								% of Ownership and Voting Rights Held by the Company
Name of Associate		Principal Activities		Incorporation and Operation				December 31, 2023				December 31, 2024				December 31, 2023				December 31, 2024
								NT$				NT$
								(In Millions)				(In Millions)
Vanguard International Semiconductor Corporation (VIS)		Manufacturing, sales, packaging, testing and computer-aided design of integrated circuits and other semiconductor devices and the manufacturing and design service of masks			Hsinchu, Taiwan			$	13,496.0			$	18,212.9				28%				28%
Systems on Silicon Manufacturing Company Pte Ltd. (SSMC)		Manufacturing and sales of integrated circuits and other semiconductor devices			Singapore				9,728.8				11,387.2				39%				39%
Xintec Inc. (Xintec)		Wafer level chip size packaging and wafer level post passivation interconnection service			Taoyuan, Taiwan				3,734.3				4,189.6				41%				41%
Global Unichip Corporation (GUC)		Researching, developing, manufacturing, testing and marketing of integrated circuits			Hsinchu, Taiwan				2,482.9				3,458.1				35%				35%
								$	29,442.0			$	37,247.8

Summary of Market Prices of Investments Accounted for Using Equity Method in Publicly Traded Stocks Calculated by Closing Price at End of Reporting Period

		December 31,  2023								December 31,  2024
				NT$								NT$
Name of Associate				(In Millions)								(In Millions)
GUC				$	81,236.9							$	63,495.5
VIS				$	37,834.2							$	50,620.3
Xintec				$	14,188.4							$	22,033.8

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The disclosure of associates. [Refer: Total for all associates [member]]

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