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DEBT (Tables)
 12 Months Ended
Dec. 31, 2023
Debt Disclosure [Abstract]  
Schedule of outstanding debt by category
The following table summarizes our debt as of the dates indicated below:

Summary of outstanding debt by category
Maturity Dates
Interest Rate(s) Per Annum at December 31, 2023
December 31,
(in millions)20232022
Unsecured Payroll Support Program Loans2030to 20311.00%$3,496 $3,496 
Unsecured notes2024to20292.90%to7.38%2,590 2,997 
Financing arrangements secured by SkyMiles assets:
SkyMiles Notes(1)
2024to20284.50%and 4.75%4,518 5,144 
SkyMiles Term Loan(1)(2)
2024to20279.17%1,772 2,820 
NYTDC Special Facilities Revenue Bonds(1)
2024to20454.00%to6.00%3,656 2,838 
Financing arrangements secured by aircraft:
Certificates(1)
2024to20282.00%to8.00%1,591 1,802 
Notes(1)(2)
2024to20336.72%to7.65%165 813 
Financing arrangements secured by slots, gates and/or routes:
2020 Senior Secured Notes20257.00%838 1,542 
2018 Revolving Credit Facility(2)
2026to2028Undrawn— — 
Other financings(1)(2)
2024to20302.51%to5.00%67 67 
Other revolving credit facilities(2)
2024to2026Undrawn— — 
Total secured and unsecured debt18,693 21,519 
Unamortized (discount)/premium and debt issuance cost, net and other(83)(138)
Total debt18,610 21,381 
Less: current maturities(2,625)(2,055)
Total long-term debt$15,985 $19,326 
(1)Due in installments.
(2)Certain financings are comprised of variable rate debt. All variable rates are equal to SOFR (generally subject to a floor) or another index rate plus a specified margin.
Schedule of fair value of outstanding debt The fair value of debt, shown below, is principally based on reported market values, recently completed market transactions and estimates based on interest rates, maturities, credit risk and underlying collateral. Debt is primarily classified as Level 2 within the fair value hierarchy.
Fair value of outstanding debt
(in millions)December 31,
2023		December 31,
2022
Net carrying amount$18,610 $21,381 
Fair value$18,400 $20,700 
Schedule of future debt maturities
The following table summarizes scheduled maturities of our debt for the years succeeding December 31, 2023:

Future debt maturities

(in millions)		Total DebtAmortization of
Debt (Discount)/Premium and Debt Issuance Cost, net and other
2024$2,633 $(49)
20252,006 (32)
20262,610 (6)
20272,315 — 
20281,884 — 
Thereafter7,245 4 
Total$18,693 $(83)$18,610