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Leases (Tables) | 6 Months Ended
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Jun. 30, 2019
Leases [Abstract] |
Lease-Related Assets and Liabilities | Lease-related assets and liabilities recorded on the unaudited Condensed Consolidated Balance Sheet were as follows:
(in millions) | Balance Sheet location | June 30, 2019
Assets |  |
Operating | Operating lease right-of-use assets (net) | $ | 1,424 |
Finance | Property and equipment (net of allowance for depreciation and amortization of $401) | 862 |
Total lease assets |  | $ | 2,286 |
Liabilities |  |
Current |  |
Operating | Current operating lease liabilities | $ | 350 |
Finance | Current maturities of long-term debt | 86 |
Noncurrent |  |
Operating | Noncurrent operating lease liabilities | 1,072 |
Finance | Long-term debt less current maturities | 608 |
Total lease liabilities |  | $ | 2,116 |
Components of Lease Cost | The components of lease costs, included in the unaudited Condensed Consolidated Statement of Comprehensive Income, were as follows:
(in millions) | Statement of Comprehensive Income location | Three months ended June 30, 2019 |  | Six months ended June 30, 2019
Operating lease cost - aircraft (a) | Other operating expenses | $ | 44 |  |  | $ | 88 |
Operating lease cost - other | Landing fees and airport rentals, and Other operating expenses | 22 |  |  | 44 |
Short-term lease cost | Other operating expenses | 1 |  |  | 2 |
Variable lease cost | Landing fees and airport rentals, and Other operating expenses | 349 |  |  | 679 |
Finance lease cost: |  |  |  |
Amortization of lease liabilities | Depreciation and amortization | 29 |  |  | 58 |
Interest on lease liabilities | Interest expense | 7 |  |  | 14 |
Total net lease cost |  | $ | 452 |  |  | $ | 885 |
(a) Net of sublease income of $25 million and $50 million for the three and six months ended June 30, 2019, respectively.
Schedule of Cash Flow, Supplemental Disclosures | Supplemental cash flow information related to leases, included in the unaudited Condensed Consolidated Statement of Cash Flows, was as follows:
(in millions) | Three months ended June 30, 2019 |  | Six months ended June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating cash flows for operating leases | $ | 107 |  |  | $ | 203 |
Operating cash flows for finance leases | 7 |  |  | 14 |
Financing cash flows for finance leases | 21 |  |  | 43 |
Right-of-use assets obtained in exchange for lease obligations: |  |  |
Operating leases | 5 |  |  | 124 |
Finance leases | — |  |  | 1 |
Finance lease maturity | As of June 30, 2019, maturities of lease liabilities were as follows:
(in millions) | Operating leases |  | Finance leases
Remainder of 2019 | $ | 210 |  |  | $ | 55 |
2020 | 344 |  |  | 109 |
2021 | 213 |  |  | 104 |
2022 | 140 |  |  | 101 |
2023 | 110 |  |  | 97 |
Thereafter | 752 |  |  | 339 |
Total lease payments | $ | 1,769 |  |  | $ | 805 |
Less imputed interest | (347 | ) |  | (111 | )
Total lease obligations | 1,422 |  |  | 694 |
Less current obligations | (350 | ) |  | (86 | )
Long-term lease obligations | $ | 1,072 |  |  | $ | 608 |
Lessee Operating and Finance Leases Weighted Average Assumptions | The table below presents additional information related to the Company's leases as of June 30, 2019:
| As of June 30, 2019
Weighted average remaining lease term |
Operating leases | 9 years |
Finance leases | 8 years |
Weighted average discount rate |
Operating leases (a) | 3.8 | %
Finance leases | 3.8 | %
(a) Upon adoption of the New Lease Standard, the incremental borrowing rate used for existing leases was established as of January 1, 2019.
Operating lease maturity | As of June 30, 2019, maturities of lease liabilities were as follows:
(in millions) | Operating leases |  | Finance leases
Remainder of 2019 | $ | 210 |  |  | $ | 55 |
2020 | 344 |  |  | 109 |
2021 | 213 |  |  | 104 |
2022 | 140 |  |  | 101 |
2023 | 110 |  |  | 97 |
Thereafter | 752 |  |  | 339 |
Total lease payments | $ | 1,769 |  |  | $ | 805 |
Less imputed interest | (347 | ) |  | (111 | )
Total lease obligations | 1,422 |  |  | 694 |
Less current obligations | (350 | ) |  | (86 | )
Long-term lease obligations | $ | 1,072 |  |  | $ | 608 |
Future Minimum Lease Payments Under Capital Leases And Noncancelable Operating Leases | Future minimum lease payments under capital leases and noncancelable operating leases and rentals to be received under subleases with initial or remaining terms in excess of one year at December 31, 2018, were as follows:
(in millions) |  | Capital leases |  | Operating leases |  | Subleases |  | Operating leases, net
2019 |  | $ | 111 |  |  | $ | 348 |  |  | $ | (92 | ) |  | $ | 256 |
2020 |  | 109 |  |  | 357 |  |  | (78 | ) |  | 279 |
2021 |  | 105 |  |  | 244 |  |  | (41 | ) |  | 203 |
2022 |  | 100 |  |  | 172 |  |  | (17 | ) |  | 155 |
2023 |  | 97 |  |  | 146 |  |  | (7 | ) |  | 139 |
Thereafter |  | 335 |  |  | 474 |  |  | (1 | ) |  | 473 |
Total minimum lease payments |  | $ | 857 |  |  | $ | 1,741 |  |  | $ | (236 | ) |  | $ | 1,505 |
Less amount representing interest |  | 126 |  |  |  |  |  |  |
Present value of minimum lease payments (a) |  | 731 |  |  |  |  |  |  |
Less current portion |  | 85 |  |  |  |  |  |  |
Long-term portion |  | $ | 646 |  |  |  |  |  |  |
(a) Excludes lease incentive obligation of $114 million

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