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Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 4	$ (10)	$ 16	$ 101
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	1	0	2
Comprehensive income (loss)	4	(9)	16	103
Less: Net income (loss) attributable to noncontrolling interests, net of tax	4	(2)	10	14
Comprehensive income (loss) attributable to TDS shareholders	$ 0	$ (7)	$ 6	$ 89

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