Basis of Presentation - Narrative (Details) $ in Millions	9 Months Ended
Sep. 30, 2024 USD ($) segment	Sep. 30, 2023 USD ($)
Basis of Presentation [Line Items]
Change in reportable segments	During the second quarter of 2024, TDS and UScellular modified their reporting structure due to the planned disposal of the UScellular wireless operations and, as a result, disaggregated the UScellular operations into two reportable segments - Wireless and Towers. This presentation reflects how TDS' and UScellular's chief operating decision maker allocates resources and evaluates operating performance following this strategic shift. Prior periods have been updated to conform to the new reportable segments. See Note 14 — Business Segment Information for additional information about TDS' segments.
Number of reportable segments \| segment	2
Noncash software license acquisitions \| $	$ 11	$ 18
UScellular
Basis of Presentation [Line Items]
TDS ownership of UScellular	83.00%

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