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Stock-Based Compensation - UScellular, Overview (Details) - UScellular - Common Shares - shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
UScellular Long-Term Incentive Plans
Stock-based compensation, overview
Shares reserved	13,769,000
Non-Employee Directors' Plan
Stock-based compensation, overview
Shares reserved	500,000
Shares issued	36,000	22,000	20,000

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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