Receivables and Related Allowance for Credit Losses - Narrative (Details) $ in Millions |
9 Months Ended | 12 Months Ended |
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Sep. 30, 2026
USD ($)
segment
class
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Dec. 31, 2025 |
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| Financing Receivable, Allowance for Credit Loss [Line Items] | ||
| Portfolio segments | segment | 2 | |
| Customer classes | class | 2 | |
| Off-balance-sheet credit exposures | $ | $ 0 | |
| EIP Receivables Allowance | ||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||
| Weighted average effective imputed interest rate | 10.90% | 10.30% |
| Minimum | ||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||
| Installment period | 24 months | |
| Maximum | ||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||
| Installment period | 36 months |
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- Definition Equipment Installment Period No definition available.
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- Definition Number of Customer Classes No definition available.
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- Definition Number of Portfolio Segments No definition available.
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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/2003/role/disclosureRef
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- Definition Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Yield on the receivable, on which interest has been imputed, as calculated from its issuance value or purchase price. The calculated effective interest rate considers factors such as the issued face value or price paid for the receivable, the time period between payments, and the time until maturity [full receipt] of the receivable. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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