Short-Term Loans (Tables)

12 Months Ended

Dec. 31, 2019

Short-term loans [Member]

Disclosure of detailed information about borrowings [Line Items]

Summary of Loans

	December 31
	2018		2019
	NT$		NT$
	(In Millions)
Unsecured loans	$	100	$	90

The annual interest rates of loans were as follows:

	December 31
	2018	2019
Unsecured loans	1.35%-2.35%	1.20%-2.50%