Annual report [Section 13 and 15(d), not S-K Item 405]

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

v3.25.4
Fair Value Measurements and Derivatives - Effects of Cash Flow Hedge Accounting on Consolidated Statements of Operations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Other Comprehensive Loss $ 23,232 $ (10,642) $ (1,773)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) (33,408) (4,923) 26,173
Fuel Costs 675,887 698,050  
Fuel 5,639,163 5,688,696 5,468,587
Depreciation and amortization 1,078,755 890,242 808,568
Interest expense, net (953,506) (747,223) (727,531)
Other income (expense), net (178,641) 54,224 (40,204)
Fuel      
Derivative Instruments, Gain (Loss) [Line Items]      
Fuel 675,887 698,050 716,833
Cash Flow Hedging      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) (33,408) (4,923) 26,173
Fuel Costs     716,833
Depreciation and amortization     808,568
Other income (expense), net     (40,204)
Amount of Gain (Loss) Recognized in Other Comprehensive Loss 23,232 (10,642) (1,773)
Cash Flow Hedging | Fuel      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) (15,531) 12,321 39,138
Cash Flow Hedging | Depreciation and amortization      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) (16,475) (16,478) (12,819)
Cash Flow Hedging | Fuel contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) (1,402) (766) (146)
Amount of Gain (Loss) Recognized in Other Comprehensive Loss (29,823) 9,482 (15,144)
Cash Flow Hedging | Fuel contracts | Fuel      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) (15,531) 12,321 39,138
Cash Flow Hedging | Fuel contracts | Other income (expense), net      
Derivative Instruments, Gain (Loss) [Line Items]      
Loss on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring 1,402 766 146
Cash Flow Hedging | Foreign currency contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Other Comprehensive Loss 53,055 (20,124) 13,371
Cash Flow Hedging | Foreign currency contracts | Depreciation and amortization      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) $ (16,475) $ (16,478) $ (12,819)