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Operating Segments Information (Tables)

12 Months Ended

Dec. 31, 2017

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Segment Revenue and Operating Results

b. Segment revenue and operating results

		Foundry				Others				Total
		NT$				NT$				NT$
		(In Millions)				(In Millions)				(In Millions)
Year ended December 31, 2015
Net revenue from external customers		$	842,690.2			$	807.2			$	843,497.4
Income (loss) from operations			320,833.2				(785.4	)			320,047.8
Share of profits (loss) of associates and joint venture			4,582.0				(385.6	)			4,196.4
Income tax expense (benefit)			47,646.5				(1.8	)			47,644.7

Geographic Information

c. Geographic information

		Net Revenue from External Customers												Non-current Assets
		Years Ended December 31												December 31,				December 31,
		2015				2016				2017				2016				2017
		NT$				NT$				NT$				NT$				NT$
		(In Millions)				(In Millions)				(In Millions)				(In Millions)				(In Millions)
Taiwan		$	90,169.5			$	127,063.0			$	90,129.4			$	991,567.9			$	1,027,963.2
United States			566,600.2				610,371.1				620,948.7				8,245.0				7,515.9
Asia			123,705.9				146,907.4				194,477.1				14,071.3				44,213.4
Europe, the Middle East and Africa			57,065.0				58,042.3				68,538.3				8.7				8.1
Others			5,956.8				5,554.5				3,353.7				—				—
		$	843,497.4			$	947,938.3			$	977,447.2			$	1,013,892.9			$	1,079,700.6

Production Information

d. Production information

		Years Ended December 31
Production		2015				2016				2017
		NT$				NT$				NT$
		(In Millions)				(In Millions)				(In Millions)
Wafer		$	766,228.8			$	861,170.8			$	874,572.6
Others			77,268.6				86,767.5				102,874.6
		$	843,497.4			$	947,938.3			$	977,447.2

Major Customers Representing at Least 10% of Net Revenue

e. Major customers representing at least 10% of net revenue

		Years Ended December 31
		2015								2016								2017
		Amount				%				Amount				%				Amount				%
		NT$								NT$								NT$
		(In Millions)								(In Millions)								(In Millions)
Customer A		$	134,117.2				16			$	157,185.4				17			$	214,228.8				22
Customer B			134,158.4				16				107,463.2				11				64,096.2				7

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