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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Earnings per share
The amounts used in computing basic and diluted earnings per share attributable to TDS shareholders were as follows:
Year Ended December 31,
2019
 
2018
 
2017
(Dollars and shares in millions, except per share amounts)
 
 
 
 
 
Net income attributable to TDS shareholders used in basic earnings per share
$
121

 
$
135

 
$
153

Adjustments to compute diluted earnings:
 
 
 
 
 
Noncontrolling interest adjustment
(1
)
 
(2
)
 
—

Net income attributable to TDS shareholders used in diluted earnings per share
$
120

 
$
133

 
$
153

 
 
 
 
 
 
Weighted average number of shares used in basic earnings per share:
 
 
 
 
 
Common Shares
107

 
105

 
104

Series A Common Shares
7

 
7

 
7

Total
114

 
112

 
111

 
 
 
 
 
 
Effects of dilutive securities
2

 
2

 
1

Weighted average number of shares used in diluted earnings per share
116

 
114

 
112

 
 
 
 
 
 
Basic earnings per share attributable to TDS shareholders
$
1.06

 
$
1.20

 
$
1.39

 
 
 
 
 
 
Diluted earnings per share attributable to TDS shareholders
$
1.03

 
$
1.17

 
$
1.37