Quarterly report [Sections 13 or 15(d)]

Fair Value Measurements and Derivatives (Details)

v3.26.1
Fair Value Measurements and Derivatives (Details)
T in Thousands, $ in Thousands, € in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
T
Mar. 31, 2026
EUR (€)
T
Dec. 31, 2025
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Fair value of long-term debt $ 14,400,000   $ 14,100,000
Fair value of long-term debt in excess of carrying value $ 1,200,000   $ 900,000
Fuel contracts      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Derivative maturing date Dec. 31, 2027    
Not Designated as Hedging Instrument | Fuel contracts      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Derivative maturing date Oct. 31, 2027    
Projected fuel purchases | T 27 27  
Not Designated as Hedging Instrument | Foreign exchange      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notional amount of derivatives $ 303,000 € 262.3  
Designated as Hedging Instrument | Fuel contracts      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Projected fuel purchases 642    
Designated as Hedging Instrument | Foreign exchange      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notional amount of derivatives $ 3,600,000 € 3,100.0