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

Fair Value Measurements and Derivatives (Details)

v3.25.4
Fair Value Measurements and Derivatives (Details)
T in Thousands, $ in Thousands, € in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
T
Dec. 31, 2025
EUR (€)
T
Dec. 31, 2024
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Fair value of long-term debt $ 14,100,000   $ 12,800,000
Fair value of long-term debt in excess of carrying value $ (900,000)   $ (600,000)
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]      
Projected fuel purchases | T 51 51  
Not Designated as Hedging Instrument | Foreign exchange      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notional amount of derivatives $ 93,600 € 79.7  
Designated as Hedging Instrument | Fuel contracts      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Projected fuel purchases 694    
Designated as Hedging Instrument | Foreign exchange      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notional amount of derivatives $ 1,200,000 € 1,000.0