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Consolidated Statement Of Comprehensive Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Statement of Comprehensive Income [Abstract]      
Net income (loss) $ (487) $ 72 $ 188
Change related to retirement plan      
Net actuarial gains (losses) 8 (4) 9
Amortization of prior service cost and unrecognized net gain 0 4 4
Amounts included in net periodic benefit cost for the period 8 0 13
Change in deferred income taxes (2) 0 (4)
Change related to retirement plan, net of tax 6 0 9
Net change in accumulated other comprehensive income (loss) 6 0 9
Comprehensive income (loss) (481) 72 197
Less: Net income attributable to noncontrolling interests, net of tax 13 10 32
Comprehensive income (loss) attributable to TDS shareholders $ (494) $ 62 $ 165