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Interest Income (Tables)

12 Months Ended

Dec. 31, 2021

Text Block [Abstract]

Summary of interest income


		Years Ended December 31
		2019				2020				2021
		NT$				NT$				NT$
		(In Millions)				(In Millions)				(In Millions)

Interest income
Bank deposits		$	11,454.0			$	5,139.1			$	2,834.8
Financial assets at FVTPL			339.5				2.5				—
Financial assets at FVTOCI			3,476.2				3,121.9				2,192.5
Financial assets at amortized cost			919.7				754.9				681.5


		$	16,189.4			$	9,018.4			$	5,708.8