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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2022
Earnings Per Share [Abstract]  
Earnings per share
The amounts used in computing basic and diluted earnings (loss) per share attributable to TDS common shareholders were as follows:
Three Months Ended
September 30,		Nine Months Ended
September 30,
 2022202120222021
(Dollars and shares in millions, except per share amounts)   
Net income (loss) attributable to TDS common shareholders used in basic earnings (loss) per share$(25)$28 $35 $105 
Adjustments to compute diluted earnings (loss):
Noncontrolling interest adjustment— (1)— (2)
Net income (loss) attributable to TDS common shareholders used in diluted earnings (loss) per share$(25)$27 $35 $103 
Weighted average number of shares used in basic earnings (loss) per share:
Common Shares107 108 107 108 
Series A Common Shares7 7 7 7 
Total114 115 114 115 
Effects of dilutive securities— 1 1 1 
Weighted average number of shares used in diluted earnings (loss) per share114 116 115 116 
Basic earnings (loss) per share attributable to TDS common shareholders$(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