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Basis of Presentation - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Basis of Presentation [Line Items]
Noncash software license acquisitions	$ 6	$ 11
Change in reportable segments	During the second quarter of 2024, UScellular modified its reporting structure due to the planned disposal of its wireless operations and, as a result, disaggregated its operations into two reportable segments – Wireless and Towers. This presentation reflects how 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 11 — Business Segment Information for additional information about UScellular's segments.
TDS | UScellular
Basis of Presentation [Line Items]
Ownership percentage	82.00%

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