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v3.19.1

RECENT ACCOUNTING PRONOUNCEMENTS - Narratives (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Jan. 01, 2019 | Dec. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Operating lease right-of-use assets | $ 2,543 |  |  | $ 0
Operating lease liability | 2,585 |  |  |
Hedge margin liabilities | 383 |  |  | 325
Income Tax Expense (Benefit) |  |  |  |
Income tax benefit | (329) | $ (316) |  |
Retained earnings | 8,249 |  |  | 8,006
Accumulated other comprehensive loss | (4,818) | (5,638) |  | (4,994)
Investments and Restricted Cash | 169 |  |  | 170
Operating Leases, Future Minimum Payments Due |  |  |  | $ 2,967
Revenues | 17,160 | 17,113 |  |
Operating expenses | $ 15,766 | $ 15,593 |  |
2016-02 |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Operating lease right-of-use assets |  |  | $ 2,650 |
Operating lease liability |  |  | $ 2,700 |

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