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Leases - Consolidated Balance Sheet (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Leases - Consolidated Balance Sheet |  |  |
Prepaid expenses | $ 50 | $ 50 | $ 63
Operating lease right-of-use assets | 900 | 899 | 0
Other assets and deferred charges | 566 | 567 | 579
Short-term operating lease liabilities | 105 | 101 | 0
Other current liabilities | 79 | 86 | 94
Long-term operating lease liabilities | 865 | 878 | 0
Other deferred liabilities and credits | $ 319 | 292 | $ 389
ASC 842 Adjustment |  |  |
Leases - Consolidated Balance Sheet |  |  |
Prepaid expenses |  | (13) |
Operating lease right-of-use assets |  | 899 |
Other assets and deferred charges |  | (12) |
Short-term operating lease liabilities |  | 101 |
Other current liabilities |  | (8) |
Long-term operating lease liabilities |  | 878 |
Other deferred liabilities and credits |  | $ (97) |

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