Investments in Unconsolidated Entities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Equity method investments:
Capital contributions, loans, advances and adjustments		$ 104	$ 104
Cumulative share of income		2,729	2,570
Cumulative share of distributions		(2,385)	(2,235)
Total equity method investments		448	439
Measurement alternative method investments		4	4
Investments recorded using the net asset value practical expedient		9	9
Total investments in unconsolidated entities		461	452
Assets
Current		1,400	1,723
Total assets	[1]	10,750	11,119
Liabilities and Equity
Current liabilities		901	1,195
Partners’ capital and shareholders’ equity		4,642	4,570	$ 4,563	$ 4,426
Total liabilities and equity	[1]	10,750	11,119
Results of Operations
Revenues		3,906	4,169	4,122
Operating expenses		3,767	4,100	3,952
Operating income		139	69	170
Net income		58	35	160
Equity Method Investments
Assets
Current		1,003	1,071
Noncurrent		6,383	6,431
Total assets		7,386	7,502
Liabilities and Equity
Current liabilities		762	764
Noncurrent liabilities		1,148	1,241
Partners’ capital and shareholders’ equity		5,476	5,497
Total liabilities and equity		7,386	7,502
Results of Operations
Revenues		7,277	7,275	7,100
Operating expenses		5,683	5,662	5,130
Operating income		1,594	1,613	1,970
Other income (expense), net		(28)	(16)	15
Net income		$ 1,566	$ 1,597	$ 1,985

[1] The consolidated total assets as of December 31, 2023 and 2022, include assets held by consolidated variable interest entities (VIEs) of $1,217 million and $1,265 million, respectively, which are not available to be used to settle the obligations of UScellular. The consolidated total liabilities as of December 31, 2023 and 2022, include certain liabilities of consolidated VIEs of $26 million and $25 million, respectively, for which the creditors of the VIEs have no recourse to the general credit of UScellular. See Note 14 — Variable Interest Entities for additional information.