Revenue Recognition - Schedule of Contract with Customer, Asset and Liability (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Customer receivables, net of allowance | $ 1,148 | $ 1,316 |
| Contract assets | 26 | 33 |
| Contract liabilities | 773 | 647 |
| Allowance | $ 33 | 57 |
| Held for sale | Mass Markets Fiber-to-the Home Business | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Customer receivables, net of allowance | 13 | |
| Contract liabilities | $ 32 |
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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, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right to consideration is unconditional. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of allowance for credit loss for right to consideration in exchange for good or service transferred to customer when right to consideration is unconditional. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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