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Lease Accounting Leasee Accounting (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2019 | Jun. 30, 2018 | Jan. 01, 2019 | Dec. 31, 2018
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lease right-of-use assets, net |  |  |  | $ 889 |
Lessee, Operating Lease, Liability, 2019 (remainder) | $ 55 | $ 55 |  |  |
NET CASH FLOWS PROVIDED BY OPERATING ACTIVITIES |  | 3,894 | $ 3,162 |  |
Net Cash Provided by (Used in) Financing Activities |  | $ (926) | (2,582) |  |
Operating Lease, Weighted Average Remaining Lease Term | 22 years | 22 years |  |  |
Finance Lease, Weighted Average Remaining Lease Term | 10 years | 10 years |  |  |
Operating Lease, Cost | $ 31 | $ 59 |  |  |
Finance Lease, Interest Expense | 0 | 0 |  |  |
Lease assets obtained in exchange for new lease liabilities |  | 15 | $ 0 |  |
Finance Lease, Liability, 2019 (remainder) | 1 | 1 |  |  |
Lease Liabilities, 2019 (remainder) | 56 | 56 |  |  |
Lessee, Operating Lease, 2020 | 93 | 93 |  |  |
Finance Lease, Liability, 2020 | 2 | 2 |  |  |
Lease Liabilities, 2020 | 95 | 95 |  |  |
Lessee, Operating Lease, 2021 | 84 | 84 |  |  |
Finance Lease, Liability, 2021 | 2 | 2 |  |  |
Lease Liabilities, 2021 | 86 | 86 |  |  |
Lessee, Operating Lease, 2022 | 71 | 71 |  |  |
Finance Lease, Liability, 2022 | 1 | 1 |  |  |
Lease Liabilities, 2022 | 72 | 72 |  |  |
Lessee, Operating Lease, 2023 | 67 | 67 |  |  |
Finance Lease, Liability, 2023 | 1 | 1 |  |  |
Lease Liabilities, 2023 | 68 | 68 |  |  |
Lessee, Operating Lease, Thereafter | 1,152 | 1,152 |  |  |
Thereafter | 5 | 5 |  |  |
Finance Lease, Liability, Thereafter | 6 | 6 |  |  |
Lease Liabilities, Thereafter | 1,158 | 1,158 |  |  |
Lessee, Operating Lease, Liability, Payments, Due | 1,522 | 1,522 |  |  |
Finance Lease, Liability, Payments, Due | 13 | 13 |  |  |
Lease Liabilities, Due | 1,535 | 1,535 |  |  |
Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 659 | 659 |  |  |
Finance Lease, Liability, Undiscounted Excess Amount | 3 | 3 |  |  |
Lease Liability, Undiscounted Excess Amount | 662 | 662 |  |  |
Operating Lease, Liability | 863 | 863 |  | 888 |
Finance Lease, Liability | 10 | 10 |  |  |
Lease, Liabilities | 873 | 873 |  |  |
Lease, Cost, Gross | 49 | 92 |  |  |
Lease, Cost | 37 | 69 |  |  |
Operating lease current liabilities | 59 | 59 |  | 71 | $ 0
Accrued and other current liabilities | 2,686 | 2,686 |  | 2,917 | 2,918
Non-current operating lease liabilities | 803 | 803 |  | 823 | 0
Property, plant and equipment, net | 68,187 | 68,187 |  | 66,962 | 66,963
Current maturities of long-term debt | 7 | 7 |  | 2,656 | 2,655
Long-term debt, less current maturities | 46,499 | 46,499 |  | 43,379 | 43,373
Other non-current liabilities | $ 1,139 | $ 1,139 |  | $ 1,172 | $ 1,184
Minimum [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lessee, Operating Lease, Renewal Term | 1 year | 1 year |  |  |
Maximum [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lessee, Operating Lease, Renewal Term | 20 years | 20 years |  |  |
Equipment [Member] | Minimum [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lessee, Operating Lease, Term of Contract | 5 years | 5 years |  |  |
Equipment [Member] | Maximum [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lessee, Operating Lease, Term of Contract | 15 years | 15 years |  |  |
Real Estate [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lessee, Operating Lease, Term of Contract | 40 years | 40 years |  |  |
Operating Leases [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lease right-of-use assets, net | $ 849 | $ 849 |  |  |
NET CASH FLOWS PROVIDED BY OPERATING ACTIVITIES |  | (79) |  |  |
Operating lease current liabilities | 59 | 59 |  |  |
Accrued and other current liabilities | 1 | 1 |  |  |
Non-current operating lease liabilities | 803 | 803 |  |  |
Finance Leases [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lease, Cost | 1 | 2 |  |  |
Accrued and other current liabilities | 1 | 1 |  |  |
Property, plant and equipment, net | 2 | 2 |  |  |
Finance Lease, Right-of-Use Asset | 4 | 4 |  |  |
Long-term debt, less current maturities | 7 | 7 |  |  |
Other non-current liabilities | $ 2 | $ 2 |  |  |
ETO [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Operating Lease, Weighted Average Discount Rate, Percent | 5.00% | 5.00% |  |  |
Finance Lease, Weighted Average Discount Rate, Percent | 8.00% | 8.00% |  |  |
Cost of Goods, Total [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Operating Lease, Cost | $ 8 | $ 16 |  |  |
Depreciation And Amortization [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Finance Lease, Right-of-Use Asset, Amortization | 1 | 2 |  |  |
Operating Expense [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Operating Lease, Cost | 19 | 36 |  |  |
Short-term Lease, Cost | 12 | 23 |  |  |
Variable Lease, Cost | 5 | 8 |  |  |
Selling, General and Administrative Expenses [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Operating Lease, Cost | 4 | 7 |  |  |
Other Revenue [Member] |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Sublease Income | $ 12 | $ 23 |  |  |

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