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Earnings Per Share - Reconciliation (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Earnings per share        
Net income (loss) attributable to TDS common shareholders used in basic earnings (loss) per share $ (19) $ 18 $ (29) $ 61
Noncontrolling interest adjustment 0 0 0 (1)
Net income (loss) attributable to TDS common shareholders used in diluted earnings (loss) per share $ (19) $ 18 $ (29) $ 60
Weighted average number of shares used in basic earnings (loss) per share: 113 115 113 115
Effects of dilutive securities (in shares) 0 1 0 1
Weighted average number of shares used in diluted earnings (loss) per share 113 116 113 116
Basic earnings (loss) per share attributable to TDS common shareholders $ (0.17) $ 0.15 $ (0.25) $ 0.53
Diluted earnings (loss) per share attributable to TDS common shareholders $ (0.17) $ 0.15 $ (0.25) $ 0.52
Common Shares        
Earnings per share        
Weighted average number of shares used in basic earnings (loss) per share: 106 108 106 108
Series A Common Shares        
Earnings per share        
Weighted average number of shares used in basic earnings (loss) per share: 7 7 7 7