Intangible Assets - Schedules (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Licenses
Loss on impairment of licenses	$ 3	$ 0	$ 0
Finite-Lived Intangible Assets
Gross Amount	316	288
Accumulated Amortization	(112)	(91)
Net Amount	204	197
Franchise rights
Finite-Lived Intangible Assets
Gross Amount	255	255
Accumulated Amortization	(85)	(68)
Net Amount	170	187
Customer lists
Finite-Lived Intangible Assets
Gross Amount	26	27
Accumulated Amortization	(25)	(23)
Net Amount	1	4
Internet protocol addresses
Finite-Lived Intangible Assets
Gross Amount	34	5
Accumulated Amortization	(2)	0
Net Amount	32	5
Other
Finite-Lived Intangible Assets
Gross Amount	1	1
Accumulated Amortization	0	0
Net Amount	1	1
UScellular
Licenses
Loss on impairment of licenses	3
TDS Telecom
Licenses
Loss on impairment of licenses	0
Licenses
Licenses
Balance, beginning of period	4,097	2,638
Acquisitions	595	1,464
Loss on impairment of licenses	(3)
Transferred to Assets held for sale	1	(18)
Exchanges - Licenses received	1
Capitalized interest	8	13
Balance, end of period	4,699	4,097	2,638
Licenses | UScellular
Licenses
Balance, beginning of period	4,092	2,633
Acquisitions	595	1,464
Loss on impairment of licenses	(3)
Transferred to Assets held for sale	1	(18)
Exchanges - Licenses received	1
Capitalized interest	8	13
Balance, end of period	4,694	4,092	2,633
Licenses | TDS Telecom
Licenses
Balance, beginning of period	5	5
Acquisitions	0	0
Loss on impairment of licenses	0
Transferred to Assets held for sale	0	0
Exchanges - Licenses received	0
Capitalized interest	0	0
Balance, end of period	$ 5	$ 5	$ 5