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INCOME TAXES - Tax Reform (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 28, 2018 | Jan. 28, 2018 | Oct. 28, 2018 | Dec. 31, 2017
U.S. Tax Reform |  |  |  |
Corporate federal statutory tax rate (as a percent) | 21.00% |  |  | 35.00%
Net provisional income tax expense (benefit) |  | $ 965 |  |
Discrete tax expense related to the remeasurement of net deferred tax assets |  | 715 |  |
Deemed earnings repatriation tax |  | 262 |  |
Net tax expense (benefit) related to lower income tax rate |  | $ (12) |  |
Deemed repatriation tax payment period |  | 8 years |  |
Forecasted |  |  |  |
U.S. Tax Reform |  |  |  |
Corporate federal statutory tax rate (as a percent) |  |  | 23.30% |
Equipment Operations |  |  |  |
U.S. Tax Reform |  |  |  |
Net provisional income tax expense (benefit) |  | $ 1,243 |  |
Financial Services |  |  |  |
U.S. Tax Reform |  |  |  |
Net provisional income tax expense (benefit) |  | $ (278) |  |

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