Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of the three input levels in the hierarchy of fair value measurements

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 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 following financial assets and liabilities as of December 31, 2023 and 2022:

		As of December 31, 2023			As of December 31, 2022
	Input Level	Carrying Amount		Fair Value	Carrying Amount	Fair Value
		(Dollars in millions)
Equity securities(1)	1	$	—	—	22	22
Long-term debt, excluding finance lease and other obligations	2	19,703		13,304	20,255	17,309
Indemnifications related to the sale of the Latin American business(2)	3	86		86	86	86

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(1)For the years ended December 31, 2023 and 2022, we recognized a $22 million and a $109 million of loss on equity securities in other (expense) income, net in our consolidated statements of operations.

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

Schedule of Investments held at net asset value

	As of December 31, 2023		As of December 31, 2022
	Net Asset Value
	(Dollars in millions)
Investment in limited partnership(1)	$	10	85

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(1)For the years ended December 31, 2023 and December 31, 2022, we recognized $75 million and $83 million of loss on investment, respectively, reflected in other (expense) income, net in our consolidated statement of operations.