Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2025

Fair Value Disclosures [Abstract]

Schedule of carrying amounts and estimated fair values of long-term debt, excluding capital lease obligations, and input levels to determine fair values

The following table presents the carrying amounts and estimated fair values of our financial liabilities as of June 30, 2025 and December 31, 2024, as well as the input level used to determine the fair values indicated below:

		June 30, 2025			December 31, 2024
	Input Level	Carrying Amount		Fair Value	Carrying Amount	Fair Value
		(Dollars in millions)
Long-term debt, excluding finance leases and other obligations	2	$	9,580	9,965	9,436	9,716
Indemnifications related to the sale of the Latin American business(1)	3	87		84	87	84

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(1)Nonrecurring fair value is measured as of August 1, 2022.