Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (10)	$ 47	$ 101	$ 152
Change related to retirement plan Amounts included in net periodic benefit cost for the period
Amortization of prior service cost	1	1	2	2
Comprehensive income (loss)	(9)	48	103	154
Less: Net income (loss) attributable to noncontrolling interests, net of tax	(2)	7	14	26
Comprehensive income (loss) attributable to TDS shareholders	$ (7)	$ 41	$ 89	$ 128