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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, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Earnings per share        
Net income (loss) attributable to TDS common shareholders $ (14) $ (19) $ (3) $ (29)
Weighted average number of shares used in basic and diluted earnings (loss) per share: 114 113 113 113
Basic earnings (loss) per share attributable to TDS common shareholders $ (0.13) $ (0.17) $ (0.02) $ (0.25)
Diluted earnings (loss) per share attributable to TDS common shareholders $ (0.13) $ (0.17) $ (0.03) $ (0.25)
Common Shares        
Earnings per share        
Weighted average number of shares used in basic and diluted earnings (loss) per share: 107 106 106 106
Series A Common Shares        
Earnings per share        
Weighted average number of shares used in basic and diluted earnings (loss) per share: 7 7 7 7