v3.26.1
Fair Value Measurements and Derivatives - Effects of Cash Flow Hedge Accounting on Consolidated Statements of Operations (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Loss $ (69,193) $ 22,076 $ 55,946 $ 52,901
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) 34,649 (11,044) 36,238 (15,117)
Fuel 1,586,808 1,456,847 2,964,689 2,760,785
Depreciation and amortization 271,205 243,760 531,921 475,057
Interest expense, net 189,915 260,013 374,362 504,235
Other income (expense), net (24,843) (167,729) 141,376 77,457
Fuel        
Derivative Instruments, Gain (Loss) [Line Items]        
Fuel 219,384 157,377 388,310 332,391
Cash Flow Hedging        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Loss (69,193) 22,076 55,946 52,901
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) 34,649 (11,044) 36,238 (15,117)
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) 33,694 (6,147) 38,701 (5,857)
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) (4,141) (4,120) (8,264) (8,239)
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) 5,096 (777) 5,801 (1,021)
Cash Flow Hedging | Fuel contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Loss (31,543) (27,268) 130,773 (16,596)
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) 33,694 (6,147) 38,701 (5,857)
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 5,096 (777) 5,801 (1,021)
Cash Flow Hedging | Foreign currency contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Loss (37,650) 49,344 (74,827) 69,497
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) $ (4,141) $ (4,120) $ (8,264) $ (8,239)