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v3.25.1

Long-term Debt, Short-term Borrowings and Finance Lease Obligations - Finance Lease Obligations (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024 | Jul. 29, 2024
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Long-term debt | $ 8,474 | $ 8,539 |
Finance lease, liability | 122 | 116 |
Total debt and finance lease obligations | 8,548 | 8,618 |
Less: Debt issuance costs | (74) | (79) |
Less: Current maturities | (384) | (392) |
Long-term debt and finance lease obligations | 8,090 | 8,147 |
Fixed rate special facility bonds, due through 2036 |  |  |
Debt Instrument [Line Items] |  |  |
Secured Debt | 43 | 43 |
2019-1 Series AA, due through 2032 |  |  |
Debt Instrument [Line Items] |  |  |
Secured Debt | 452 | 452 |
2019-1 Series A, due through 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Secured Debt | 141 | 141 |
2019-1 Series B, due through 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Secured Debt | 58 | 58 |
2020-1 Series A, due through 2032 |  |  |
Debt Instrument [Line Items] |  |  |
Secured Debt | 469 | 469 |
2020-1 Series B, due through 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Secured Debt | 100 | 100 |
Fixed rate equipment notes, due through 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Secured Debt | 190 | 219 |
Floating rate equipment notes, due through 2036 |  |  |
Debt Instrument [Line Items] |  |  |
Secured Debt | 725 | 742 |
Aircraft failed sale-leaseback transactions, due through 2036 |  |  |
Debt Instrument [Line Items] |  |  |
Secured Debt | 2,192 | 2,221 |
TrueBlue® senior secured notes, due through 2031 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt | 1,988 | 1,988 |
TrueBlue® senior secured term loan facility, due through 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt | 748 | 749 |
Unsecured CARES Act Payroll Support Program loan, due through 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Unsecured debt | 259 | 259 |
Unsecured Consolidated Appropriations Act Payroll Support Program Extension loan, due through 2031 |  |  |
Debt Instrument [Line Items] |  |  |
Unsecured debt | 144 | 144 |
Unsecured American Rescue Plan Act of 2021 Payroll Support loan, due through 2031 |  |  |
Debt Instrument [Line Items] |  |  |
Unsecured debt | 132 | 132 |
0.50% convertible senior notes, due through 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt | $ 325 | 325 |
Debt instrument, interest rate, stated percentage (in percent) | 0.50% |  |
2.50% convertible senior notes, due through 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt | $ 460 | $ 460 |
Debt instrument, interest rate, stated percentage (in percent) |  |  | 2.50%

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