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Earnings Per Share - Reconciliation (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Earnings per share        
Net income (loss) attributable to TDS common shareholders used in basic earnings (loss) per share $ (25) $ 28 $ 35 $ 105
Noncontrolling interest adjustment 0 (1) 0 (2)
Net income (loss) attributable to TDS common shareholders used in diluted earnings (loss) per share $ (25) $ 27 $ 35 $ 103
Weighted average number of shares used in basic earnings (loss) per share: 114 115 114 115
Effects of dilutive securities (in shares) 0 1 1 1
Weighted average number of shares used in diluted earnings (loss) per share 114 116 115 116
Basic earnings (loss) per share attributable to TDS common shareholders $ (0.22) $ 0.24 $ 0.31 $ 0.91
Diluted earnings (loss) per share attributable to TDS common shareholders $ (0.22) $ 0.24 $ 0.30 $ 0.89
Common Shares        
Earnings per share        
Weighted average number of shares used in basic earnings (loss) per share: 107 108 107 108
Series A Common Shares        
Earnings per share        
Weighted average number of shares used in basic earnings (loss) per share: 7 7 7 7