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Acquisitions, Divestitures and Exchanges (Details) $ in Millions | Sep. 30, 2019 USD ($)
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Acquisitions, Divestitures and Exchanges [Abstract] |
Acquisition agreement amount | $ 80
Households passed | 36,500

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- Definition Acquisitions, Divestitures and Exchanges [Abstract] + References No definition available. + Details
Name: | tds_AcquisitionsDivestituresandExchangesAbstract
Namespace Prefix: | tds_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of agreement to acquire a business. + References No definition available. + Details
Name: | tds_BusinessAcquisitionAgreementAmount
Namespace Prefix: | tds_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Number of households passed in the service area. + References No definition available. + Details
Name: | tds_Householdspassed
Namespace Prefix: | tds_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant