Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements and Derivatives (Details)

v3.20.4
Fair Value Measurements and Derivatives (Details)
kT in Thousands, T in Thousands, $ in Millions, € in Billions
12 Months Ended
Nov. 01, 2020
kT
Dec. 31, 2020
EUR (€)
T
Dec. 31, 2020
USD ($)
T
Dec. 31, 2019
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair value of long-term debt     $ 14,197.8 $ 6,957.8
Fair value of long-term debt in excess of carrying value     $ 2,176.1 $ 31.3
Fuel swaps        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Derivative maturing date   Dec. 31, 2023    
Projected fuel purchases | T   596 596  
Fuel swaps | Derivatives not Designated as Hedging Instruments        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Derivative maturing date   Sep. 30, 2021    
Projected fuel purchases | T   89 89  
Fuel Hedge | 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 | kT 197      
Foreign currency contracts        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Notional amount of derivatives   € 1.9 $ 2,300.0  
Interest rate contracts        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Notional amount of derivatives     $ 700.0