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FINANCIAL DERIVATIVE INSTRUMENTS - Fair Values by Balance Sheet Location (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fuel derivative contracts | Prepaid expenses and other current assets |  |
Derivatives, Fair Value |  |
Gross amounts of recognized assets | $ 22 | $ 86
Gross amounts offset in the balance sheet | 4 | 15
Cash collateral deposits held from counterparties for fuel contracts - current | 4 | 15
Fuel derivative contracts | Other assets |  |
Derivatives, Fair Value |  |
Gross amounts of recognized assets | 108 | 137
Gross amounts offset in the balance sheet | 18 | 35
Cash collateral deposits held from counterparties for fuel contracts - current | 18 | 35
Fuel derivative contracts | Accounts and other receivables |  |
Derivatives, Fair Value |  |
Receivable from third parties for fuel contracts | 1 | 12
Designated as Hedging Instrument |  |
Derivatives, Fair Value |  |
Gross amounts of recognized assets | 130 | 223
Gross amounts offset in the balance sheet | 0 | 0
Designated as Hedging Instrument | Fuel derivative contracts | Prepaid expenses and other current assets |  |
Derivatives, Fair Value |  |
Gross amounts of recognized assets | 22 | 86
Gross amounts offset in the balance sheet | 0 | 0
Designated as Hedging Instrument | Fuel derivative contracts | Other assets |  |
Derivatives, Fair Value |  |
Gross amounts of recognized assets | 108 | 137
Gross amounts offset in the balance sheet | $ 0 | $ 0

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