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Leases, Additional Information (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Dec. 31, 2019
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ROU assets, net reflected in the following balance sheet line items: |  |
Operating lease ROU assets, net, balance sheet line item | us-gaap:OtherAssetsNoncurrent |
Operating leases - deferred charges and other assets, net | $ 1,297 | $ 1,329
Current lease liabilities reflected in the following balance sheet line items: |  |
Current operating lease liabilities, balance sheet line item | us-gaap:AccruedLiabilitiesCurrent |
Operating leases - accrued expenses | $ 342 | 331
Noncurrent lease liabilities reflected in the following balance sheet line items: |  |
Noncurrent operating lease liabilities, balance sheet line item | us-gaap:OtherLiabilitiesNoncurrent |
Operating leases - other long-term liabilities | $ 928 | 959
Operating leases - total lease liabilities | $ 1,270 | 1,290
ROU assets, net reflected in the following balance sheet line items: |  |
Finance lease ROU assets, net, balance sheet line item | us-gaap:PropertyPlantAndEquipmentNet |
Finance leases - property, plant, and equipment, net | $ 2,203 | 790
Current lease liabilities reflected in the following balance sheet line items: |  |
Current finance lease liabilities, balance sheet line item | us-gaap:DebtCurrent |
Finance leases - current portion of debt and finance lease obligations | $ 63 | 41
Noncurrent lease liabilities reflected in the following balance sheet line items: |  |
Noncurrent finance lease liabilities, balance sheet line item | us-gaap:LongTermDebtAndCapitalLeaseObligations |
Finance leases - debt and finance lease obligations, less current portion | $ 2,149 | 750
Finance leases - total lease liabilities | $ 2,212 | $ 791
Operating Leases |  |
Weighted-average remaining lease term | 7 years 6 months | 7 years 8 months 12 days
Weighted-average discount rate | 4.80% | 4.90%
Finance Leases |  |
Weighted-average remaining lease term | 22 years 10 months 24 days | 19 years 8 months 12 days
Weighted-average discount rate | 4.40% | 5.20%

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