Fair Value of Financial Instruments - Carrying Amounts (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Fair Value Inputs, Level 2 \| Carrying Amount
Fair value disclosure
Long-term debt, excluding finance lease and other obligations	$ 12,945	$ 17,221
Fair Value Inputs, Level 2 \| Fair Value
Fair value disclosure
Long-term debt, excluding finance lease and other obligations	12,101	17,101
Fair Value, Inputs, Level 3 \| Carrying Amount
Fair value disclosure
Indemnifications related to the sale of the Latin American business	98	86
Regulatory cost liability related to the sale of the Mass Markets Fiber-to-the-Home business	36	0
Fair Value, Inputs, Level 3 \| Fair Value
Fair value disclosure
Indemnifications related to the sale of the Latin American business	82	82
Regulatory cost liability related to the sale of the Mass Markets Fiber-to-the-Home business	$ 36	$ 0

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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+ Details