Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements and Derivatives (Details)

v3.21.1
Fair Value Measurements and Derivatives (Details)
T in Thousands, $ in Millions, € in Billions
3 Months Ended
Mar. 31, 2021
USD ($)
T
Mar. 31, 2021
EUR (€)
T
Dec. 31, 2020
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Fair value of long-term debt $ 13,911.7   $ 14,197.8
Fair value of long-term debt in excess of carrying value $ 1,478.7   $ 2,176.1
Fuel swaps      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Derivative maturing date Dec. 31, 2023    
Projected fuel purchases | T 366 366  
Fuel swaps | Derivatives not Designated as Hedging Instruments      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Derivative maturing date Dec. 31, 2022    
Projected fuel purchases | T 405 405  
Foreign currency contracts      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notional amount of derivatives $ 2,200.0 € 1.9  
Interest rate contracts      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Notional amount of derivatives $ 600.0