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Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2024

Disclosure Of Property Plant And Equipment [Line Items]

Summary of Assets Used by the Company Explanatory


	December 31
	2023		2024
	NT$		NT$
	(In Millions)
Assets used by the Company	$	285,085	$	284,715
Assets subject to operating leases		7,253		5,125
	$	292,338	$	289,840

Summary of Property, Plant and Equipment


	Land			Land Improvements			Buildings			Computer Equipment			Telecommuni- cations Equipment			Transportation Equipment			Miscellaneous Equipment			Construction in Progress and Equipment to be Accepted			Total
	NT$			NT$			NT$			NT$			NT$			NT$			NT$			NT$			NT$
	(In Millions)
Accumulated depreciation and impairment
Balance on January 1, 2023	$	—		$	(1,474	)	$	(32,263	)	$	(9,554	)	$	(597,957	)	$	(3,673	)	$	(8,642	)	$	—		$	(653,563	)
Depreciation expenses		—			(34	)		(1,439	)		(698	)		(25,704	)		(94	)		(797	)		—			(28,766	)
Disposal		—			—			—			1,049			24,867			113			411			—			26,440
Impairment losses		—			—			—			—			(299	)		—			—			—			(299	)
Effect of foreign exchange differences		—			—			—			—			5			—			1			—			6
Others		—			—			418			(18	)		(43	)		(1	)		4			—			360
Balance on December 31, 2023	$	—		$	(1,508	)	$	(33,284	)	$	(9,221	)	$	(599,131	)	$	(3,655	)	$	(9,023	)	$	—		$	(655,822	)
Balance on December 31, 2023, net	$	102,885		$	201		$	38,471		$	1,824		$	122,304		$	395		$	3,068		$	15,937		$	285,085
Cost
Balance on January 1, 2024	$	102,885		$	1,709		$	71,755		$	11,045		$	721,435		$	4,050		$	12,091		$	15,937		$	940,907
Additions		—			—			176			25			321			4			139			27,910			28,575
Disposal		—			—			(18	)		(1,240	)		(27,010	)		(154	)		(506	)		—			(28,928	)
Effect of foreign exchange differences		—			—			—			—			167			—			9			16			192
Others		(539	)		40			2,265			619			23,440			284			947			(27,290	)		(234	)
Balance on December 31, 2024	$	102,346		$	1,749		$	74,178		$	10,449		$	718,353		$	4,184		$	12,680		$	16,573		$	940,512
Accumulated depreciation and impairment
Balance on January 1, 2024	$	—		$	(1,508	)	$	(33,284	)	$	(9,221	)	$	(599,131	)	$	(3,655	)	$	(9,023	)	$	—		$	(655,822	)
Depreciation expenses		—			(36	)		(1,467	)		(747	)		(25,434	)		(128	)		(830	)		—			(28,642	)
Disposal		—			—			17			1,240			27,003			153			485			—			28,898
Effect of foreign exchange differences		—			—			—			—			(105	)		—			(5	)		—			(110	)
Others		—			—			12			2			(7	)		—			(128	)		—			(121	)
Balance on December 31, 2024	$	—		$	(1,544	)	$	(34,722	)	$	(8,726	)	$	(597,674	)	$	(3,630	)	$	(9,501	)	$	—		$	(655,797	)
Balance on December 31, 2024, net	$	102,346		$	205		$	39,456		$	1,723		$	120,679		$	554		$	3,179		$	16,573		$	284,715

Disclosure Of Property Plant And Equipment Estimated Useful Life Explanatory


Land improvements		10-30 years
Buildings
Main buildings		20-60 years
Other building facilities		3-15 years
Computer equipment		2-8 years
Telecommunications equipment
Telecommunication circuits		2-30 years
Telecommunication machinery and antennas equipment		2-30 years
Transportation equipment		2-10 years
Miscellaneous equipment
Leasehold improvements		1-18 years
Mechanical and air conditioner equipment		3-16 years
Others		1-15 years

Summary of Future Aggregate Lease Collection under Operating Lease for Freehold Plant, Property and Equipment

The future aggregate lease collection under operating lease for investment properties is as follows:


	December 31
	2023		2024
	NT$		NT$
	(In Millions)
Year 1	$	168	$	274
Year 2		157		248
Year 3		134		217
Year 4		105		192
Year 5		83		190
Onwards		435		1,306
	$	1,082	$	2,427

Property, plant and equipment subject to operating leases [member]

Disclosure Of Property Plant And Equipment [Line Items]

Summary of Property, Plant and Equipment

Assets subject to operating leases


	Land			Buildings			Total
	NT$			NT$			NT$
	(In Millions)
Cost
Balance on January 1, 2022	$	4,809		$	4,134		$	8,943
Additions		—			—			—
Others		(433	)		(949	)		(1,382	)
Balance on December 31, 2022	$	4,376		$	3,185		$	7,561
Accumulated depreciation and impairment
Balance on January 1, 2022	$	—		$	(1,692	)	$	(1,692	)
Depreciation expenses		—			(59	)		(59	)
Others		—			389			389
Balance on December 31, 2022	$	—		$	(1,362	)	$	(1,362	)
Balance on December 31, 2022, net	$	4,376		$	1,823		$	6,199
Cost
Balance on January 1, 2023	$	4,376		$	3,185		$	7,561
Additions		—			4			4
Others		548			942			1,490
Balance on December 31, 2023	$	4,924		$	4,131		$	9,055
Accumulated depreciation and impairment
Balance on January 1, 2023	$	—		$	(1,362	)	$	(1,362	)
Depreciation expenses		—			(73	)		(73	)
Others		—			(367	)		(367	)
Balance on December 31, 2023	$	—		$	(1,802	)	$	(1,802	)
Balance on December 31, 2023, net	$	4,924		$	2,329		$	7,253
Cost
Balance on January 1, 2024	$	4,924		$	4,131		$	9,055
Additions		—			1			1
Others		(1,820	)		(394	)		(2,214	)
Balance on December 31, 2024	$	3,104		$	3,738		$	6,842
Accumulated depreciation and impairment
Balance on January 1, 2024	$	—		$	(1,802	)	$	(1,802	)
Depreciation expenses		—			(65	)		(65	)
Others		—			150			150
Balance on December 31, 2024	$	—		$	(1,717	)	$	(1,717	)
Balance on December 31, 2024, net	$	3,104		$	2,021		$	5,125

Disclosure Of Property Plant And Equipment Estimated Useful Life Explanatory


Buildings
Main buildings		35-60 years
Other building facilities		3-15 years

Summary of Future Aggregate Lease Collection under Operating Lease for Freehold Plant, Property and Equipment


	December 31
	2023		2024
	NT$		NT$
	(In Millions)
Year 1	$	381	$	305
Year 2		279		198
Year 3		221		122
Year 4		176		92
Year 5		146		62
Onwards		1,025		137
	$	2,228	$	916

Assets Used by the Company [Member]

Disclosure Of Property Plant And Equipment [Line Items]

Summary of Property, Plant and Equipment


	Land			Land Improvements			Buildings			Computer Equipment			Telecommuni- cations Equipment			Transportation Equipment			Miscellaneous Equipment			Construction in Progress and Equipment to be Accepted			Total
	NT$			NT$			NT$			NT$			NT$			NT$			NT$			NT$			NT$
	(In Millions)
Cost
Balance on January 1, 2022	$	102,645		$	1,662		$	71,358		$	11,217		$	713,534		$	3,927		$	10,809		$	10,786		$	925,938
Additions		460			—			133			102			149			1			253			30,167			31,265
Disposal		(4	)		(6	)		(7	)		(808	)		(18,395	)		(104	)		(392	)		—			(19,716	)
Effect of foreign exchange differences		—			—			—			—			209			—			4			19			232
Others		563			19			1,046			578			24,571			147			794			(26,545	)		1,173
Balance on December 31, 2022	$	103,664		$	1,675		$	72,530		$	11,089		$	720,068		$	3,971		$	11,468		$	14,427		$	938,892
Accumulated depreciation and impairment
Balance on January 1, 2022	$	—		$	(1,442	)	$	(30,578	)	$	(9,632	)	$	(590,533	)	$	(3,699	)	$	(8,205	)	$	—		$	(644,089	)
Depreciation expenses		—			(39	)		(1,452	)		(725	)		(25,654	)		(77	)		(754	)		—			(28,701	)
Disposal		—			7			7			807			18,382			104			388			—			19,695
Effect of foreign exchange differences		—			—			—			—			(110	)		—			(2	)		—			(112	)
Others		—			—			(240	)		(4	)		(42	)		(1	)		(69	)		—			(356	)
Balance on December 31, 2022	$	—		$	(1,474	)	$	(32,263	)	$	(9,554	)	$	(597,957	)	$	(3,673	)	$	(8,642	)	$	—		$	(653,563	)
Balance on December 31, 2022, net	$	103,664		$	201		$	40,267		$	1,535		$	122,111		$	298		$	2,826		$	14,427		$	285,329
Cost
Balance on January 1, 2023	$	103,664		$	1,675		$	72,530		$	11,089		$	720,068		$	3,971		$	11,468		$	14,427			938,892
Additions		99			—			36			127			106			3			243			29,780			30,394
Disposal		(2	)		—			(1	)		(1,049	)		(24,877	)		(112	)		(418	)		—			(26,459	)
Effect of foreign exchange differences		—			—			—			—			(5	)		—			(3	)		—			(8	)
Others		(876	)		34			(810	)		878			26,143			188			801			(28,270	)		(1,912	)
Balance on December 31, 2023	$	102,885		$	1,709		$	71,755		$	11,045		$	721,435		$	4,050		$	12,091		$	15,937		$	940,907