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Financial Instruments at Fair Value Through Profit or Loss (Tables)

12 Months Ended

Dec. 31, 2024

Disclosure Of Financial Instruments At Fair Value Through Profit Or Loss [Abstract]

Summary of Financial Instruments at Fair Value through Profit or Loss


		December 31
		2023				2024
		NT$				NT$
		(In Millions)
Financial assets-current
Mandatorily measured at FVTPL
Derivatives (not designated for hedge)
Forward exchange contracts		$	1			$	—
Non-derivatives
Listed stocks - domestic			—				—

		$	1			$	—

Financial assets-noncurrent
Mandatorily measured at FVTPL
Non-derivatives
Non-listed stocks - domestic		$	704			$	629
Non-listed stocks - foreign			89				32
Limited partnership - domestic			219				307
Other investing agreements			24				37

		$	1,036			$	1,005

Disclosure of Detailed Information Outstanding Derivative Contracts Not Designated for Hedge Explanatory

Outstanding forward exchange contracts not designated for hedge as of balance sheet dates were as follows:


				Maturity		Contract Amount
		Currency		Period		(In Millions)
December 31, 2023
Forward exchange contracts - buy		NT$/EUR		March 2024		NT$145/EUR4

December 31, 2024
Forward exchange contracts - buy		NT$/USD		January 2025		NT$46/USD1

Forward exchange contracts - buy		NT$/EUR		March 2025		NT$10/EUR0.3