XML 90 R72.htm IDEA: XBRL DOCUMENT v3.22.0.1
Financial Derivative Instruments - Location and Amount Recognized in Income by Hedging Relationship (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Cash Flow Hedging        
Derivative [Line Items]        
Amount of loss reclassified from AOCI into income $ (463) $ 106    
Cash Flow Hedging | Fuel derivative contracts        
Derivative [Line Items]        
Amount of loss reclassified from AOCI into income (461) 80    
Cash Flow Hedging | Interest rate derivatives        
Derivative [Line Items]        
Amount of loss reclassified from AOCI into income $ (2) $ 26    
Fuel and oil        
Derivative [Line Items]        
Derivatives designated as hedging instruments     $ 4 $ 70
Fuel and oil | Cash Flow Hedging | Fuel derivative contracts        
Derivative [Line Items]        
Amount of loss reclassified from AOCI into income     4 70
Fuel and oil | Cash Flow Hedging | Interest rate derivatives        
Derivative [Line Items]        
Amount of loss reclassified from AOCI into income     0 0
Fuel and oil | Fair Value Hedging | Not Designated as Hedging Instrument | Interest rate derivatives        
Derivative [Line Items]        
Hedged items     0 0
Fuel and oil | Fair Value Hedging | Designated as Hedging Instrument | Interest rate derivatives        
Derivative [Line Items]        
Derivatives designated as hedging instruments     0 0
Other (gains)/losses, net        
Derivative [Line Items]        
Derivatives designated as hedging instruments     6 39
Other (gains)/losses, net | Cash Flow Hedging | Fuel derivative contracts        
Derivative [Line Items]        
Amount of loss reclassified from AOCI into income     6 39
Other (gains)/losses, net | Cash Flow Hedging | Interest rate derivatives        
Derivative [Line Items]        
Amount of loss reclassified from AOCI into income     0 0
Other (gains)/losses, net | Fair Value Hedging | Not Designated as Hedging Instrument | Interest rate derivatives        
Derivative [Line Items]        
Hedged items     0 0
Other (gains)/losses, net | Fair Value Hedging | Designated as Hedging Instrument | Interest rate derivatives        
Derivative [Line Items]        
Derivatives designated as hedging instruments     0 0
Other operating expenses        
Derivative [Line Items]        
Derivatives designated as hedging instruments     6  
Other operating expenses | Cash Flow Hedging | Fuel derivative contracts        
Derivative [Line Items]        
Amount of loss reclassified from AOCI into income     0  
Other operating expenses | Cash Flow Hedging | Interest rate derivatives        
Derivative [Line Items]        
Amount of loss reclassified from AOCI into income     6  
Other operating expenses | Fair Value Hedging | Not Designated as Hedging Instrument | Interest rate derivatives        
Derivative [Line Items]        
Hedged items     0  
Other operating expenses | Fair Value Hedging | Designated as Hedging Instrument | Interest rate derivatives        
Derivative [Line Items]        
Derivatives designated as hedging instruments     $ 0  
Interest expense        
Derivative [Line Items]        
Derivatives designated as hedging instruments       6
Interest expense | Cash Flow Hedging | Fuel derivative contracts        
Derivative [Line Items]        
Amount of loss reclassified from AOCI into income       0
Interest expense | Cash Flow Hedging | Interest rate derivatives        
Derivative [Line Items]        
Amount of loss reclassified from AOCI into income       1
Interest expense | Fair Value Hedging | Not Designated as Hedging Instrument | Interest rate derivatives        
Derivative [Line Items]        
Hedged items       11
Interest expense | Fair Value Hedging | Designated as Hedging Instrument | Interest rate derivatives        
Derivative [Line Items]        
Derivatives designated as hedging instruments       $ (6)