Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings per share [abstract]

Net Income and Weighted Average Number of Common Stocks Used in Calculation of Earnings Per Share

Net income and weighted average number of common stocks used in the calculation of earnings per share were as follows:

Net Income

	Year Ended December 31
	2020			2021			2022
	NT$			NT$			NT$
	(In Millions)
Net income used to compute the basic earnings    per share
Net income attributable to the parent	$	33,419		$	35,616		$	36,358
Assumed conversion of all dilutive potential    common stocks
Employee stock options and employee compensation    of subsidiaries		(7	)		(6	)		(7	)
Net income used to compute the diluted earnings    per share	$	33,412		$	35,610		$	36,351

Weighted Average Number of Common Stocks

(Millions Shares)

	Year Ended December 31
	2020		2021		2022
Weighted average number of common stocks used    to compute the basic earnings per share		7,757		7,757		7,757
Assumed conversion of all dilutive potential    common stocks
Employee compensation		8		8		8
Weighted average number of common stocks used    to compute the diluted earnings per share		7,765		7,765		7,765