Noncontrolling Interests (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Noncontrolling Interest [Abstract]
Net income attributable to TDS shareholders	$ (500)	$ 62	$ 156
Transfer (to) from the noncontrolling interests
Change in TDS’ Capital in excess of par value from UScellular's issuance of UScellular shares	(33)	(19)	(49)
Change in TDS’ Capital in excess of par value from UScellular’s repurchases of UScellular shares	0	35	17
Net transfers (to) from noncontrolling interests	(33)	16	(32)
Net income (loss) attributable to TDS shareholders after transfers (to) from noncontrolling interests	(533)	$ 78	$ 124
Redeemable noncontrolling interest
Settlement value of mandatorily redeemable noncontrolling interests	21
Carrying value of mandatorily redeemable noncontrolling interests	$ 6