Financial Assets at Fair Value through Other Comprehensive Income Noncurrent (Tables)

12 Months Ended

Dec. 31, 2019

Noncurrent Financial Assets At Fair Value Through Other Comprehensive Income [Abstract]

Summary of Financial Assets at Fair Value through Other Comprehensive Income Noncurrent

	December 31
	2018		2019
	NT$		NT$
	(In Millions)
Domestic investments
Listed stocks	$	2,900	$	2,454
Non-listed stocks		3,901		4,566
Foreign investments
Non-listed stocks		132		134
	$	6,933	$	7,154