17.	PROPERTY, PLANT AND EQUIPMENT

	December 31
	2016		2017
	NT$		NT$
	(In Millions)
Carrying amount
Land	$	103,872	$	104,079
Land improvements		333		302
Buildings		42,147		45,895
Computer equipment		2,713		2,374
Telecommunications equipment		119,195		114,900
Transportation equipment		629		321
Miscellaneous equipment		2,140		2,310
Construction in progress and equipment to be accepted		20,141		18,527
	$	291,170	$	288,708

	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, 2015	$	102,774		$	1,558		$	67,600		$	15,318		$	695,076		$	3,824		$	8,643		$	20,930		$	915,723
Additions		—			—			59			37			159			—			203			23,993			24,451
Disposal		—			—			(11	)		(1,073	)		(13,047	)		(69	)		(511	)		—			(14,711	)
Effect of foreign exchange differences		—			—			—			—			69			—			—			—			69
Acquisitions through business combinations		19			—			7			—			—			—			39			—			65
Others		(46	)		17			135			714			23,115			60			363			(24,521	)		(163	)
Balance on December 31, 2015	$	102,747		$	1,575		$	67,790		$	14,996		$	705,372		$	3,815		$	8,737		$	20,402		$	925,434
Accumulated depreciation and impairment
Balance on January 1, 2015	$	—		$	(1,145	)	$	(23,202	)	$	(11,308	)	$	(568,767	)	$	(2,208	)	$	(6,443	)	$	—		$	(613,073	)
Depreciation expenses		—			(53	)		(1,269	)		(1,467	)		(26,291	)		(599	)		(671	)		—			(30,350	)
Disposal		—			—			10			1,061			13,033			69			425			—			14,598
Impairment losses		—			—			—			—			(138	)		—			—			—			(138	)
Effect of foreign exchange differences		—			—			—			—			(14	)		—			—			—			(14	)
Acquisitions through business combinations		—			—			(1	)		—			—			—			(28	)		—			(29	)
Others		—			(5	)		41			(1	)		(28	)		(12	)		(24	)		—			(29	)
Balance on December 31, 2015	$	—		$	(1,203	)	$	(24,421	)	$	(11,715	)	$	(582,205	)	$	(2,750	)	$	(6,741	)	$	—		$	(629,035	)
Cost
Balance on January 1, 2016	$	102,747		$	1,575		$	67,790		$	14,996		$	705,372		$	3,815		$	8,737		$	20,402		$	925,434
Additions		791			—			36			42			171			1			255			23,295			24,591
Disposal		(2	)		(6	)		(35	)		(1,546	)		(11,542	)		(54	)		(625	)		—			(13,810	)
Effect of foreign exchange differences		—			—			—			(3	)		(35	)		—			(4	)		—			(42	)
Others		336			12			(53	)		806			21,726			104			580			(23,556	)		(45	)
Balance on December 31, 2016	$	103,872		$	1,581		$	67,738		$	14,295		$	715,692		$	3,866		$	8,943		$	20,141		$	936,128

(Continued)

	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, 2016	$	—		$	(1,203	)	$	(24,421	)	$	(11,715	)	$	(582,205	)	$	(2,750	)	$	(6,741	)	$	—		$	(629,035	)
Depreciation expenses		—			(51	)		(1,269	)		(1,332	)		(25,280	)		(529	)		(626	)		—			(29,087	)
Disposal		—			6			34			1,529			11,512			54			583			—			13,718
Impairment losses		—			—			—			—			(596	)		—			—			—			(596	)
Effect of foreign exchange differences		—			—			—			1			7			—			4			—			12
Others		—			—			65			(65	)		65			(12	)		(23	)		—			30
Balance on December 31, 2016	$	—		$	(1,248	)	$	(25,591	)	$	(11,582	)	$	(596,497	)	$	(3,237	)	$	(6,803	)	$	—		$	(644,958	)
Cost
Balance on January 1, 2017	$	103,872		$	1,581		$	67,738		$	14,295		$	715,692		$	3,866		$	8,943		$	20,141		$	936,128
Additions		—			—			30			78			193			1			193			25,574			26,069
Disposal		(158	)		(5	)		(108	)		(974	)		(13,739	)		(62	)		(402	)		—			(15,448	)
Effect of foreign exchange differences		—			—			—			(1	)		(172	)		—			(3	)		—			(176	)
Others		365			19			5,034			764			20,080			29			784			(27,188	)		(113	)
Balance on December 31, 2017	$	104,079		$	1,595		$	72,694		$	14,162		$	722,054		$	3,834		$	9,515		$	18,527		$	946,460
Accumulated depreciation and impairment
Balance on January 1, 2017	$	—		$	(1,248	)	$	(25,591	)	$	(11,582	)	$	(596,497	)	$	(3,237	)	$	(6,803	)	$	—		$	(644,958	)
Depreciation expenses		—			(50	)		(1,402	)		(1,192	)		(24,492	)		(330	)		(677	)		—			(28,143	)
Disposal		—			4			47			967			13,712			63			389			—			15,182
Effect of foreign exchange differences		—			—			—			—			45			—			2			—			47
Others		—			1			147			19			78			(9	)		(116	)		—			120
Balance on December 31, 2017	$	—		$	(1,293	)	$	(26,799	)	$	(11,788	)	$	(607,154	)	$	(3,513	)	$	(7,205	)	$	—		$	(657,752	)