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Financial Derivative Instruments and Risk Management (Tables)
12 Months Ended
Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Effect of Fuel and Interest Rate Derivative Instruments Reflected in Aircraft Fuel and Rent Expense The following table summarizes the effect of fuel and interest rate derivative instruments reflected in aircraft fuel and rent expense, respectively, within the consolidated statements of operations (in millions):
Year Ended December 31,
202120202019
Derivatives designated as cash flow hedges
Losses on fuel derivative contracts$— $(26)$(17)
Amortization of swaption cash flow hedges$(1)$(1)$— 
Derivatives not designated as cash flow hedges
Losses on fuel derivative contracts$— $(56)$— 
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) The following table presents the net of tax impact of the overall effectiveness of derivative instruments designated as cash flow hedging instruments within the consolidated statements of comprehensive income (loss) (in millions):
Year Ended December 31,
202120202019
Derivatives designated as cash flow hedges
Fuel derivative contract gains (losses) – net of tax impact$— $(16)$22 
Fuel derivative losses reclassified to earnings due to de-designation – net of tax impact— 11 — 
Interest rate derivative contract losses – net of tax impact— (10)(1)
Amortization of swaption cash flow hedges, net of tax— — 
Total$1 $(15)$21