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Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 0	$ 39	$ 12	$ 111
Change related to retirement plan Amounts included in net periodic benefit cost for the period
Amortization of prior service cost and unrecognized net gain	0	0	0	0
Comprehensive income	0	39	12	111
Less: Net income attributable to noncontrolling interests, net of tax	2	4	6	15
Comprehensive income (loss) attributable to TDS shareholders	$ (2)	$ 35	$ 6	$ 96

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