Fair Value Information (Tables)

12 Months Ended

Dec. 31, 2022

Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]

Schedule of Carrying Amounts of Financial Assets and Liabilities Not Measured at Fair Value

Except those listed in the table below, the Company considers that the carrying amounts of financial assets and liabilities not measured at fair value approximate their fair values or the fair values cannot be reliable estimated.

	December 31, 2021				December 31, 2022
	Carrying Value		Fair Value		Carrying Value		Fair Value
Financial liabilities
Financial liabilities measured at amortized cost
Bonds payable	$	26,977	$	27,082	$	30,477	$	30,452

Carrying Amounts And Fair Value of Financial Assets and Liabilities

b.Financial instruments that are measured at fair value on a recurring basis

December 31, 2021

	Level 1		Level 2		Level 3		Total
Financial assets at FVTPL
Listed stocks	$	3	$	—	$	—	$	3
Non-listed stocks		—		—		885		885
Limited partnership		—		—		24		24
	$	3	$	—	$	909	$	912
Financial assets at FVOCI
Listed stocks	$	459	$	—	$	—	$	459
Non-listed stocks		—		—		3,157		3,157
	$	459	$	—	$	3,157	$	3,616
Financial liabilities at FVTPL
Derivatives	$	—	$	6	$	—	$	6
Hedging financial liabilities	$	—	$	8	$	—	$	8

December 31, 2022

	Level 1		Level 2		Level 3		Total
Financial assets at FVTPL
Derivatives	$	—	$	3	$	—	$	3
Listed stocks		1		—		—		1
Non-listed stocks		—		—		861		861
Limited partnership		—		—		135		135
Film and drama investing agreements		—		—		24		24
	$	1	$	3	$	1,020	$	1,024
Hedging financial assets	$	—	$	13	$	—	$	13
Financial assets at FVOCI
Listed stocks	$	273	$	—	$	—	$	273
Non-listed stocks		—		—		3,218		3,218
	$	273	$	—	$	3,218	$	3,491

Schedule of Percentage Decrease in Discount for Lack of Marketability or Noncontrolling Interests

	December 31
	2021	2022
Discount for lack of marketability	16.05%-20.00%	14.09%-20.00%
Noncontrolling interests discount	17.29%-25.00%	17.29%-20.00%
Growth rate of long-term revenue	0.19%	0.19%
Discount rate	8.50%	7.20%-8.80%

Schedule of Impact of Decrease in Discount for Lack of Marketability or Noncontrolling Interests

	December 31
	2021			2022
	NT$			NT$
	(In Millions)
Discount for lack of marketability
5% increase	$	(32	)	$	(33	)
5% decrease	$	32		$	33
Noncontrolling interests discount
5% increase	$	(19	)	$	(24	)
5% decrease	$	19		$	24
Long-term revenue growth rates
0.1% increase	$	25		$	30
0.1% decrease	$	(25	)	$	(29	)
Discount rate
1% increase	$	(288	)	$	(330	)
1% decrease	$	350		$	407

Level 3 [Member]

Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]

Schedule of Reconciliations for Financial Assets

2020

Financial Assets	Measured at  Fair Value  through Profit  or Loss			Measured at  Fair Value  through Other  Comprehensive  Income			Total
	NT$			NT$			NT$
				(In Millions)
Balance at January 1, 2020	$	778		$	4,700		$	5,478
Reclassified from investments accounted for using equity     method		—			2			2
Recognized in profit or loss under “Other gains and losses”		(101	)		—			(101	)
Recognized in other comprehensive income under “Unrealized    gain or loss on financial assets at fair value through    other comprehensive income”		—			(263	)		(263	)
Balance at December 31, 2020	$	677		$	4,439		$	5,116
Unrealized gain or loss in 2020	$	(101	)

2021

Financial Assets	Measured at  Fair Value  through Profit  or Loss			Measured at  Fair Value  through Other  Comprehensive  Income			Total
	NT$			NT$			NT$
				(In Millions)
Balance at January 1, 2021	$	677		$	4,439		$	5,116
Acquisition		25			81			106
Disposal		—			(5	)		(5	)
Reclassified to investments accounted for using equity     method		—			(64	)		(64	)
Recognized in profit or loss under “Other gains and losses”		251			—			251
Recognized in other comprehensive income under “Unrealized    gain or loss on financial assets at fair value through    other comprehensive income”		—			(1,294	)		(1,294	)
Proceeds from capital reduction of the investees		(44	)		—			(44	)
Balance at December 31, 2021	$	909		$	3,157		$	4,066
Unrealized gain or loss in 2021	$	232

2022

Financial Assets	Measured at  Fair Value  through Profit  or Loss			Measured at  Fair Value  through Other  Comprehensive  Income			Total
	NT$			NT$			NT$
				(In Millions)
Balance at January 1, 2022	$	909		$	3,157		$	4,066
Acquisition		348			16			364
Disposal		—			—			—
Recognized in profit or loss under “Other gains and losses”		(215	)		—			(215	)
Recognized in other comprehensive income under “Unrealized    gain or loss on financial assets at fair value through    other comprehensive income”		—			52			52
Proceed from capital reduction from investees		(22	)		(7	)		(29	)
Balance at December 31, 2022	$	1,020		$	3,218		$	4,238
Unrealized gain or loss in 2022	$	(209	)