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Earnings Per Share - Computation (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Earnings per share      
Net income (loss) attributable to TDS common shareholders used in basic earnings (loss) per share $ (7) $ 117 $ 226
Noncontrolling interest adjustment (1) (1) (3)
Net income (loss) attributable to TDS common shareholders used in diluted earnings (loss) per share $ (8) $ 116 $ 223
Weighted average number of shares used in basic earnings (loss) per share (in shares) 114 115 114
Effects of dilutive securities (in shares) 0 1 1
Weighted average number of shares used in diluted earnings (loss) per share (in shares) 114 116 115
Basic earnings (loss) per share attributable to TDS common shareholders $ (0.07) $ 1.03 $ 1.97
Diluted earnings (loss) per share attributable to TDS common shareholders $ (0.07) $ 1.00 $ 1.93
Common Shares      
Earnings per share      
Weighted average number of shares used in basic earnings (loss) per share (in shares) 107 108 107
Series A Common Shares      
Earnings per share      
Weighted average number of shares used in basic earnings (loss) per share (in shares) 7 7 7