Equipment Installment Plans - EIP Receivables (Details) - USD ($) $ in Millions |
Mar. 31, 2025 |
Dec. 31, 2024 |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Equipment installment plan receivables, gross | $ 1,054 | $ 1,110 |
| Allowance for credit losses | (78) | (82) |
| Equipment installment plan receivables, net | 976 | 1,028 |
| Accounts receivable — Customers and agents (Current portion) | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Equipment installment plan receivables, net | 567 | 592 |
| Other assets and deferred charges (Non-current portion) | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Equipment installment plan receivables, net | $ 409 | $ 436 |
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- Definition 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. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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