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Leases (Tables)
 12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Lease-Related Assets and Liabilities
Lease-related assets and liabilities recorded on the Consolidated Balance Sheet were as follows:
(in millions)Balance Sheet locationDecember 31, 2021December 31, 2020
Assets
OperatingOperating lease right-of-use assets (net)$1,590 $1,892 
Finance
Property and equipment (net of allowance for depreciation and amortization of $679 million and $567 million)
556 667 
Total lease assets$2,146 $2,559 
Liabilities
Current
OperatingCurrent operating lease liabilities$239 $306 
FinanceCurrent maturities of long-term debt82 83 
Noncurrent
OperatingNoncurrent operating lease liabilities1,315 1,562 
FinanceLong-term debt less current maturities377 459 
Total lease liabilities$2,013 $2,410 
Components of Lease Cost
The components of lease costs, included in the Consolidated Statement of Income (Loss), were as follows:
(in millions)Statement of Comprehensive Income (Loss) locationYear ended December 31, 2021Year ended December 31, 2020Year ended December 31, 2019
Operating lease cost - aircraft (a)Other operating expenses$204 $216 $182 
Operating lease cost - otherLanding fees and airport rentals, and Other operating expenses81 89 89 
Short-term lease costOther operating expenses1 1 4 
Variable lease costLanding fees and airport rentals, and Other operating expenses1,406 1,260 1,377 
Finance lease cost:
Amortization of lease liabilitiesDepreciation and amortization112 113 116 
Interest on lease liabilitiesInterest expense19 22 26 
Total net finance lease cost$131 $135 $142 
(a) Net of sublease income of $41 million, $78 million, and $97 million for the years ended December 31, 2021, 2020, and 2019.

Supplemental cash flow information related to leases, included in the Consolidated Statement of Cash Flows, was as follows:
(in millions)
Year ended December 31, 2021Year ended December 31, 2020Year ended December 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases$346 $398 $379 
Operating cash flows for finance leases19 22 26 
Financing cash flows for finance leases83 85 85 
Right-of-use assets obtained in exchange for lease obligations:
Operating leases327 915 230 
Finance leases— — 1 
The table below presents additional information related to the Company's leases:
Weighted average remaining lease termDecember 31, 2021December 31, 2020
Operating leases8 years10 years
Finance leases6 years7 years
Weighted average discount rate
Operating leases (a)3.5 %3.8 %
Finance leases3.8 %3.8 %
(a) Upon adoption of ASU No. 2016-02, Leases, codified in ASC 842, the incremental borrowing rate used for existing leases was established as of January 1, 2019.
Finance Lease Maturity
As of December 31, 2021, maturities of lease liabilities were as follows:
(in millions)
Operating leasesFinance leases
2022$285 $98 
2023249 94 
2024221 90 
2025184 74 
2026176 54 
Thereafter680 102 
Total lease payments$1,795 $512 
Less imputed interest(241)(53)
Total lease obligations1,554 459 
Less current obligations(239)(82)
Long-term lease obligations$1,315 $377 
Operating Lease Maturity
As of December 31, 2021, maturities of lease liabilities were as follows:
(in millions)
Operating leasesFinance leases
2022$285 $98 
2023249 94 
2024221 90 
2025184 74 
2026176 54 
Thereafter680 102 
Total lease payments$1,795 $512 
Less imputed interest(241)(53)
Total lease obligations1,554 459 
Less current obligations(239)(82)
Long-term lease obligations$1,315 $377