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Financial Derivative Instruments and Risk Management (Tables)
 12 Months Ended
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivative instrument in statement of financial position and financial performance
The table below reflects quantitative information related to our derivative instruments and where these amounts are recorded in our financial statements (dollar amounts in millions):
Year Ended December 31,
 20242023
Fuel derivatives 
Asset fair value recorded in prepaid expenses and other current assets (1)
$— $4 
Longest remaining term (months)— 3
Hedged volume (barrels, in thousands)— 2,706 
Estimated amount of existing gains (losses) expected to be reclassified into earnings in the next 12 months— (3)
(1) Gross asset or liability of each contract prior to consideration of offsetting positions with each counterparty and prior to impact of collateral paid.
Year Ended December 31,
 202420232022
Fuel derivatives
Hedge effectiveness gains (losses) recognized in aircraft fuel expense
$(10)$7 $(7)
Hedge (gains) losses on derivatives recognized in comprehensive income (loss)6 (1)3 
Percentage of actual consumption economically hedged24 %25 %7 %