The amounts used in computing earnings per common share and the effects of potentially dilutive securities on the weighted average number of common shares were as follows:

				Three Months Ended				Six Months Ended
				June 30,				June 30,
				2018		2017		2018		2017
(Dollars and shares in millions, except per share amounts)
Basic earnings per share available to TDS common
		shareholders:
	Net income available to TDS common shareholders used in basic earnings per share			$	33	$	10	$	72	$	47
Adjustments to compute diluted earnings:
	Noncontrolling interest adjustment				(1)		–		(1)		–
	Net income available to TDS common shareholders
		used in diluted earnings per share		$	32	$	10	$	71	$	47

Weighted average number of shares used in basic
	earnings per share:
		Common Shares			105		104		105		103
		Series A Common Shares			7		7		7		7
			Total		112		111		112		110

Effects of dilutive securities					1		1		1		2
Weighted average number of shares used in diluted
	earnings per share				113		112		113		112

Basic earnings per share available to TDS common
	shareholders			$	0.30	$	0.09	$	0.65	$	0.43

Diluted earnings per share available to TDS common
	shareholders			$	0.29	$	0.09	$	0.63	$	0.42