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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- Definition

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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- Definition

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

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- Definition

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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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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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Debt - Receivables Securitization Agreement (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Equipment installment plan receivables		$ 1,120	$ 1,151
UScellular \| Receivables securitization agreement
Debt Instrument [Line Items]
Amount borrowed during the period		40
Amount repaid during the period		50
Amount borrowed and outstanding		140
Amount available for use		310
UScellular \| Receivables securitization agreement \| Subsequent event
Debt Instrument [Line Items]
Amount repaid during the period	$ 75
UScellular \| Receivables securitization agreement \| Assets available to be pledged
Debt Instrument [Line Items]
Equipment installment plan receivables		$ 233
Lender's cost of funds \| UScellular \| Receivables securitization agreement
Debt Instrument [Line Items]
Contractual spread		1.15%