Annual report pursuant to Section 13 and 15(d)

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

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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, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative Instruments Gain Loss [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income $ (65,017) $ (106,670) $ 8,898
Fuel 301,852 264,712  
Depreciation and amortization 700,845 717,840 646,188
Interest expense, net 2,072,925 482,313 272,867
Other income (expense), net 123,953 (33,599) 6,155
Cash Flow Hedging      
Derivative Instruments Gain Loss [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (65,017) (106,670) 8,898
Fuel     409,602
Depreciation and amortization     646,188
Interest expense, net     (272,867)
Cash Flow Hedging | Fuel      
Derivative Instruments Gain Loss [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (41,080) (45,488) 14,093
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 (5,067) (4,929) (3,062)
Cash Flow Hedging | Interest expense, net      
Derivative Instruments Gain Loss [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (6,868) (6,600) (2,133)
Cash Flow Hedging | Fuel contracts      
Derivative Instruments Gain Loss [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (12,002) (49,653)  
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 (41,080) (45,488)  
Cash Flow Hedging | Fuel contracts | Other (Income) Expense, net      
Derivative Instruments Gain Loss [Line Items]      
Amount of gain (loss) reclassified from accumulated other comprehensive income (loss) into income as a result that a forecasted transaction is no longer probable of occurring (12,002) (49,653)  
Amount of gain recognized in income as a result of failing effectiveness tests   (5,507)  
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 (5,067) (4,929)  
Cash Flow Hedging | Interest rate contracts | Interest expense, net      
Derivative Instruments Gain Loss [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income $ (6,868) $ (6,600)  
Designated as Hedging Instrument | Cash Flow Hedging | Fuel contracts      
Derivative Instruments Gain Loss [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income     14,093
Designated as Hedging Instrument | Cash Flow Hedging | Foreign currency contracts      
Derivative Instruments Gain Loss [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income     (3,062)
Designated as Hedging Instrument | Cash Flow Hedging | Interest rate contracts      
Derivative Instruments Gain Loss [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income     $ (2,133)