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Certain Relationships And Related Transactions
 12 Months Ended
Dec. 31, 2023
Related Party Transactions [Abstract]  
Certain Relationships and Related Transactions
Note 21 Certain Relationships and Related Transactions
Sidley Austin LLP is the principal law firm of TDS and its subsidiaries: Walter C.D. Carlson, a trustee and beneficiary of a voting trust that controls TDS, the non-executive Chair of the Board and member of the Board of Directors of TDS and a director of UScellular, a subsidiary of TDS is Senior Counsel at Sidley Austin LLP; and John P. Kelsh, the General Counsel and/or an Assistant Secretary of TDS and certain other subsidiaries of TDS is a partner at Sidley Austin LLP. Walter C.D. Carlson does not provide legal services to TDS or its subsidiaries. TDS, UScellular and their subsidiaries incurred legal costs from Sidley Austin LLP of $16 million, $8 million and $10 million in 2023, 2022 and 2021, respectively.
The Audit Committee of the Board of Directors of TDS is responsible for the review and evaluation of all related-party transactions as such term is defined by the rules of the New York Stock Exchange.