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Fair Value of Financial Instruments (Tables) | 3 Months Ended
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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 |
______________________________________________________________________ (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 |
______________________________________________________________________ (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.

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- Definition Tabular disclosure of investments in certain entities that calculate net asset value per share or equivalent measured at fair value on a recurring or nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-6A + Details
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