Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Schedule of Fair Value Measurement Inputs and Valuation Techniques

The three input levels in the hierarchy of fair value measurements are defined by the FASB generally as follows:

Input Level	Description of Input
Level 1	Observable inputs such as quoted market prices in active markets.
Level 2	Inputs other than quoted prices in active markets that are either directly or indirectly observable.
Level 3	Unobservable inputs in which little or no market data exists.

Schedule of Carrying Amounts and Estimated Fair Values of Financial Assets and Liabilities

The following table presents the carrying amounts and estimated fair values of our financial assets and liabilities as of March 31, 2024 and December 31, 2023:

		March 31, 2024			December 31, 2023
	Input Level	Carrying Amount		Fair Value	Carrying Amount	Fair Value
		(Dollars in millions)
Long-term debt, excluding finance lease and other obligations	2	$	18,398	13,950	19,703	13,304
Indemnifications related to the sale of the Latin American business(1)	3	86		86	86	86

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

Schedule of Fair Value, Investments, Entities that Calculate Net Asset Value Per Share

The following table summarizes the net asset value of our investment in this limited partnership.

	As of March 31, 2024		As of December 31, 2023
	Net Asset Value
	(Dollars in millions)
Investment in limited partnership(1)	$	30	10

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(1)For the three months ended March 31, 2024, we recognized $20 million of gain on investment, reflected in other income (expense), net in our consolidated statements of operations. For the three months ended March 31, 2023, we recognized $61 million of loss on investment, reflected in other income (expense), net in our consolidated statements of operations.