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Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Operating leases: |  |
Operating lease right-of-use assets | $ 20,729 | $ 20,860
Current portion of operating lease liabilities | 1,638 | 1,596
Long-term operating lease liabilities | 18,757 | 18,926
Total operating lease liabilities | 20,395 | 20,522
Finance leases: |  |
Property and equipment, gross | 1,107 | 790
Accumulated depreciation | (106) | (38)
Property and equipment, net | 1,001 | 752
Current portion of long-term debt | 33 | 27
Long-term debt | 1,050 | 781
Total finance lease liabilities | $ 1,083 | $ 808
Weighted average remaining lease term (in years) |  |
Operating leases | 13 years 3 months 18 days | 13 years 9 months 18 days
Finance leases | 20 years 3 months 18 days | 20 years 6 months
Weighted average discount rate |  |
Operating leases | 4.50% | 4.60%
Finance leases | 5.60% | 6.70%

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