XML 108 R64.htm IDEA: XBRL DOCUMENT v3.24.2.u1
Fair Value Measurements - Carrying Amounts and Estimated Fair Values of the Company’s Debt (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Carrying Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, fair value $ 455 $ 474
Estimated Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, fair value 451 465
Pre-delivery credit facility | Carrying Value | Secured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, fair value 300 312
Pre-delivery credit facility | Estimated Fair Value | Secured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, fair value 304 316
Building note | Carrying Value | Secured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, fair value 6 16
Building note | Estimated Fair Value | Secured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, fair value 6 16
Affinity card advance purchase of miles | Carrying Value | Unsecured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, fair value 83 80
Affinity card advance purchase of miles | Estimated Fair Value | Unsecured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, fair value 81 76
PSP promissory notes | Carrying Value | Unsecured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, fair value 66 66
PSP promissory notes | Estimated Fair Value | Unsecured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, fair value $ 60 $ 57