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LEASES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Leases [Abstract] |
Schedule of lease asset and liability balance sheet position by category | The table below presents the lease-related assets and liabilities recorded on the balance sheets.
Lease asset and liability balance sheet position by category |  |
|  | December 31,
(in millions) | Classification on the Balance Sheet | 2023 | 2022
Assets |  |  |
Operating lease assets | Operating lease right-of-use assets | $ | 7,004 |  | $ | 7,036 |
Finance lease assets | Property and equipment, net | 1,338 |  | 1,487 |
Total lease assets |  | $ | 8,342 |  | $ | 8,523 |
Liabilities |  |  |
Current |  |  |
Operating | Current maturities of operating leases | $ | 759 |  | $ | 714 |
Finance | Current maturities of debt and finance leases | 358 |  | 304 |
Noncurrent |  |  |
Operating | Noncurrent operating leases | 6,468 |  | 6,866 |
Finance | Debt and finance leases | 1,086 |  | 1,345 |
Total lease liabilities |  | $ | 8,671 |  | $ | 9,229 |
Weighted-average remaining lease term |  |  |
Operating leases |  | 13 years | 13 years
Finance leases |  | 4 years | 5 years
Weighted-average discount rate |  |  |
Operating leases |  | 3.73 | % | 4.30 | %
Finance leases |  | 3.12 | % | 3.05 | %
Schedule of lease cost by category | The table below presents certain information related to the lease costs for finance and operating leases.
Lease cost by category |  |  |
| Year Ended December 31,
(in millions) | 2023 | 2022 | 2021
Finance lease cost |  |  |
Amortization of leased assets | $ | 109 |  | $ | 120 |  | $ | 131 |
Interest of lease liabilities | 42 |  | 45 |  | 55 |
Operating lease cost(1) | 981 |  | 949 |  | 863 |
Short-term lease cost(1) | 258 |  | 281 |  | 245 |
Variable lease cost(1) | 2,230 |  | 1,859 |  | 1,599 |
Total lease cost | $ | 3,620 |  | $ | 3,254 |  | $ | 2,893 |
(1)Expenses are primarily classified within aircraft rent, landing fees and other rents and regional carrier expense on our income statement.
Schedule supplemental lease-related cash flow information | The table below presents supplemental cash flow information related to leases.
Supplemental lease-related cash flow information |  |  |
| Year Ended December 31,
(in millions) | 2023 | 2022 | 2021
Cash paid for amounts included in the measurement of lease liabilities |  |  |
Operating cash flows for operating leases | $ | 1,230 |  | $ | 809 |  | $ | 999 |
Operating cash flows for finance leases | 71 |  | 49 |  | 46 |
Financing cash flows for finance leases | 264 |  | 363 |  | 336 |
Schedule of future cash flows and reconciliation to the balance sheet, operating leases | The table below reconciles the undiscounted cash flows for each of the first five years and total of the remaining years to the finance lease liabilities and operating lease liabilities recorded on the balance sheets.
Future lease cash flows and reconciliation to the balance sheet
(in millions) | Operating Leases | Finance Leases
2024 | $ | 1,021 |  | $ | 395 |
2025 | 990 |  | 257 |
2026 | 899 |  | 192 |
2027 | 860 |  | 391 |
2028 | 772 |  | 164 |
Thereafter | 4,705 |  | 157 |
Total minimum lease payments | 9,247 |  | 1,556 |
Less: amount of lease payments representing interest | (2,020) |  | (112) |
Present value of future minimum lease payments | 7,227 |  | 1,444 |
Less: current obligations under leases | (759) |  | (358) |
Long-term lease obligations | $ | 6,468 |  | $ | 1,086 |
Schedule of future cash flows and reconciliation to the balance sheet, finance leases | The table below reconciles the undiscounted cash flows for each of the first five years and total of the remaining years to the finance lease liabilities and operating lease liabilities recorded on the balance sheets.
Future lease cash flows and reconciliation to the balance sheet
(in millions) | Operating Leases | Finance Leases
2024 | $ | 1,021 |  | $ | 395 |
2025 | 990 |  | 257 |
2026 | 899 |  | 192 |
2027 | 860 |  | 391 |
2028 | 772 |  | 164 |
Thereafter | 4,705 |  | 157 |
Total minimum lease payments | 9,247 |  | 1,556 |
Less: amount of lease payments representing interest | (2,020) |  | (112) |
Present value of future minimum lease payments | 7,227 |  | 1,444 |
Less: current obligations under leases | (759) |  | (358) |
Long-term lease obligations | $ | 6,468 |  | $ | 1,086 |

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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