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Other Gains and Losses, Net (Tables)

12 Months Ended

Dec. 31, 2021

Text Block [Abstract]

Summary of Other Gains and Losses


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

Gain on disposal of financial assets, net
Investments in debt instruments at FVTOCI		$	537.8			$	1,439.4			$	93.2
Loss on disposal of subsidiaries			(4.6	)			—				—
Gain (loss) on financial instruments at FVTPL, net
Mandatorily measured at FVTPL			(2,360.7	)			8,244.5				(7,973.6	)
Gain arising from fair value hedges, net			13.1				—				—


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

The reversal (accrual) of expected credit loss of financial assets
Investments in debt instruments at FVTOCI		$	(6.9	)		$	0.9			$	(1.3	)
Financial assets at amortized cost			5.2				(4.6	)			4.0
Other gains, net			665.1				426.2				489.7


		$	(1,151.0	)		$	10,106.4			$	(7,388.0	)