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Earnings Per Share - Reconciliation (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Earnings per share    
Net income attributable to TDS common shareholders used in basic earnings per share $ 44 $ 57
Noncontrolling interest adjustment (1) (1)
Net income attributable to TDS common shareholders used in diluted earnings per share $ 43 $ 56
Weighted average number of shares used in basic earnings per share (in shares) 115 114
Effects of dilutive securities (in shares) 1 2
Weighted average number of shares used in diluted earnings per share (in shares) 116 116
Basic earnings per share attributable to TDS common shareholders (in dollars per share) $ 0.38 $ 0.49
Diluted earnings per share attributable to TDS common shareholders (in dollars per share) $ 0.37 $ 0.48
Common Shares    
Earnings per share    
Weighted average number of shares used in basic earnings per share (in shares) 108 107
Series A Common Shares    
Earnings per share    
Weighted average number of shares used in basic earnings per share (in shares) 7 7