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Lease Commitments Lease Commitments (Balance Sheets) (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Operating Leases |  |
Right-of-use asset | $ 4,265 |
Operating lease liability, current | 1,315 |
Noncurrent operating lease liabilities | 2,750 |
Total operating lease liabilities | $ 4,065 |
Weighted-average remaining lease term (in years) | 5 years 3 months 18 days |
Weighted-average discount rate | 3.20% |
Finance Leases |  |
Right-of-use asset | $ 301 |
FInance lease liability, current | 21 |
FInance lease liability, noncurrent | 249 |
FInance lease liability | $ 270 |
Weighted-average remaining lease term (in years) | 15 years 7 months 6 days |
Weighted-average discount rate | 4.90% |
Right-of-use asset obtained in exchange for operating lease liability | $ 1,152 |
Right-of-use asset obtained in exchange for finance lease liability | $ 146 |
Upstream |  |
Finance Leases |  |
Right-of-use asset |  | $ 818
Accumulated amortization |  | $ 617

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