Quarterly report [Sections 13 or 15(d)]

Fair Value Measurements and Derivatives - Effects of Cash Flow Hedge Accounting on Consolidated Statements of Operations (Details)

v3.26.3
Fair Value Measurements and Derivatives - Effects of Cash Flow Hedge Accounting on Consolidated Statements of Operations (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Loss $ 112,951 $ 43 $ 168,897 $ 52,944
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) 48,715 (8,807) 84,953 (23,924)
Fuel 1,667,668 1,554,859 4,632,357 4,315,644
Depreciation and amortization 287,703 250,832 819,624 725,889
Interest expense, net (170,544) (328,816) (507,418) (783,470)
Other income (expense), net 30,901 13,003 105,121 (167,927)
Fuel        
Derivative Instruments, Gain (Loss) [Line Items]        
Fuel 195,733 175,913 584,043 508,304
Cash Flow Hedging        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Loss 112,951 43 168,897 52,944
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) 48,715 (8,807) 84,953 (23,924)
Cash Flow Hedging | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) 47,477 (4,575) 86,178 (10,432)
Cash Flow Hedging | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:DepreciationAndAmortization        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) (4,140) (4,118) (12,404) (12,357)
Cash Flow Hedging | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherNonoperatingIncomeExpense        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) 5,378 (114) 11,179 (1,135)
Cash Flow Hedging | Fuel contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Loss 152,759 10,681 283,532 (5,915)
Cash Flow Hedging | Fuel contracts | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) 47,477 (4,575) 86,178 (10,432)
Cash Flow Hedging | Fuel contracts | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:OtherNonoperatingIncomeExpense        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of gain (loss) reclassified from accumulated other comprehensive income (loss) into income (expense) as a result that a forecasted transaction is no longer probable of occurring 5,378 (114) 11,179 (1,135)
Cash Flow Hedging | Foreign currency contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Loss (39,808) (10,638) (114,635) 58,859
Cash Flow Hedging | Foreign currency contracts | Location, Statement of Other Comprehensive Income, Balance [Axis]: us-gaap:DepreciationAndAmortization        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) $ (4,140) $ (4,118) $ (12,404) $ (12,357)