Segment Information (Tables)

12 Months Ended

Dec. 31, 2018

Analysis by reportable segment of revenues and operating results of continuing operations was as follows:

	Domestic Fixed Communi- cations Business		Mobile Communi- cations Business		Internet Business		International Fixed Communi- cations Business		Others			Total
	NT$		NT$		NT$		NT$		NT$			NT$
	(In Millions)
Year ended December 31, 2016
Revenues
From external customers	$	72,784	$	110,801	$	28,100	$	14,434	$	3,872		$	229,991
Intersegment revenues		22,669		2,530		4,734		2,680		4,122			36,735
Segment revenues	$	95,453	$	113,331	$	32,834	$	17,114	$	7,994			266,726
Intersegment elimination													(36,735	)
Consolidated revenues												$	229,991
Segment income before income tax	$	25,658	$	13,926	$	10,729	$	1,098	$	(1,998	)	$	49,413

Year ended December 31, 2017
Revenues
From external customers	$	71,137	$	109,376	$	28,917	$	13,552	$	4,532		$	227,514
Intersegment revenues		22,515		2,031		4,209		2,375		4,600			35,730
Segment revenues	$	93,652	$	111,407	$	33,126	$	15,927	$	9,132			263,244
Intersegment elimination													(35,730	)
Consolidated revenues												$	227,514
Segment income before income tax	$	24,888	$	12,433	$	11,118	$	1,029	$	(1,459	)	$	48,009

Year ended December 31, 2018
Revenues
From external customers	$	66,753	$	100,937	$	29,813	$	13,435	$	4,545		$	215,483
Intersegment revenues		17,125		1,702		4,038		2,234		5,008			30,107
Segment revenues	$	83,878	$	102,639	$	33,851	$	15,669	$	9,553			245,590
Intersegment elimination													(30,107	)
Consolidated revenues												$	215,483
Segment income before income tax	$	18,243	$	15,328	$	11,944	$	1,024	$	(1,553	)	$	44,986

Other information reviewed by the chief operating decision maker or regularly provided to the chief operating decision maker was as follows:

For the year ended December 31, 2016

	Domestic Fixed Communi- cations Business		Mobile Communi- cations Business		Internet Business		International Fixed Communi- cations Business		Others		Total
	NT$		NT$		NT$		NT$		NT$		NT$
	(In Millions)
Share of the profit of associates and joint ventures accounted for using equity method	$	—	$	—	$	—	$	—	$	515	$	515
Interest income	$	15	$	11	$	7	$	6	$	150	$	189
Interest expenses	$	—	$	2	$	—	$	—	$	18	$	20
Operating costs and expenses	$	64,230	$	79,593	$	13,160	$	14,313	$	10,094	$	181,390
Depreciation and amortization	$	16,414	$	10,620	$	3,626	$	1,451	$	374	$	32,485
Capital expenditure	$	9,846	$	8,981	$	2,718	$	1,136	$	836	$	23,517
Impairment loss on property, plant and equipment	$	—	$	596	$	—	$	—	$	—	$	596
Reversal of impairment loss on investment properties	$	148	$	—	$	—	$	—	$	—	$	148

For the year ended December 31, 2017

	Domestic Fixed Communi- cations Business		Mobile Communi- cations Business		Internet Business		International Fixed Communi- cations Business		Others		Total
	NT$		NT$		NT$		NT$		NT$		NT$
	(In Millions)
Share of the profit of associates and joint ventures accounted for using equity method	$	—	$	—	$	—	$	—	$	419	$	419
Interest income	$	21	$	15	$	9	$	15	$	145	$	205
Interest expenses	$	—	$	6	$	—	$	—	$	16	$	22
Operating costs and expenses	$	62,795	$	80,275	$	13,288	$	13,385	$	10,963	$	180,706
Depreciation and amortization	$	15,614	$	11,001	$	3,385	$	1,477	$	453	$	31,930
Capital expenditure	$	11,647	$	9,742	$	2,779	$	1,580	$	1,127	$	26,875
Reversal of impairment loss on investment properties	$	11	$	—	$	—	$	—	$	—	$	11

For the year ended December 31, 2018

	Domestic Fixed Communi- cations Business		Mobile Communi- cations Business		Internet Business		International Fixed Communi- cations Business		Others		Total
	NT$		NT$		NT$		NT$		NT$		NT$
	(In Millions)
Share of the profit of associates and joint ventures accounted for using equity method	$	—	$	—	$	—	$	—	$	509	$	509
Interest income	$	18	$	12	$	19	$	28	$	120	$	197
Interest expenses	$	—	$	—	$	—	$	—	$	18	$	18
Operating costs and expenses	$	59,430	$	73,901	$	13,766	$	13,279	$	11,573	$	171,949
Depreciation and amortization	$	15,027	$	13,788	$	3,121	$	1,425	$	448	$	33,809
Capital expenditure	$	12,693	$	10,664	$	2,729	$	1,348	$	1,116	$	28,550
Reversal of impairment loss on investment properties	$	19	$	—	$	—	$	—	$	—	$	19

The following is an analysis of the Company’s revenue from its major products and services.

	Year Ended December 31
	2016		2017		2018
	NT$		NT$		NT$
	(In Millions)
Mobile services revenue	$	78,788	$	75,823	$	63,906
Sales of product		35,377		37,649		41,289
Local telephone and domestic long distance telephone services revenue		34,531		32,247		29,996
Broadband access and domestic leased line services revenue		23,315		22,950		22,453
Data communications internet services revenue		20,906		21,143		21,137
International network and leased telephone services revenue		10,634		9,328		8,724
Others		26,440		28,374		27,978
	$	229,991	$	227,514	$	215,483

The geographic information for revenues was as follows: