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Debt - Term Loan Agreement (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Oct. 31, 2024
TDS Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 375
Amount borrowed and outstanding	299
Amount available for use	75
Amount borrowed during the period	$ 300
Quarterly installment rate	0.25%
TDS Term Loan | SOFR rate
Debt Instrument [Line Items]
Contractual spread	7.00%
UScellular Term Loan Agreements | Subsequent event
Debt Instrument [Line Items]
Amount borrowed and repaid		$ 40

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Rate of the required periodic payments on the outstanding borrowings.

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Amounts drawn from a line of credit, which have been repaid and can not be reborrowed.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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