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REVENUE RECOGNITION - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Jan. 01, 2020 | Dec. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |  |  |  |
Cooperative advertising credits included in rebates | $ 1,841,000,000 | $ 2,261,000,000 | $ 1,841,000,000 | $ 2,261,000,000 |  | $ 2,050,000,000 |  | $ 2,384,000,000
Price appreciation credits | 1,664,000,000 | 2,152,000,000 | 3,676,000,000 | 4,168,000,000 |  |  |  |
Allowances for credit loss | 52,000,000 |  | 52,000,000 |  |  | $ 48,000,000 |  |
Price Appreciation Credit |  |  |  |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |  |  |  |
Price appreciation credits |  |  | 4,000,000 | 0 |  |  |  |
Rebates, Advertising Credits Portion |  |  |  |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |  |  |  |
Cooperative advertising credits included in rebates | $ 32,000,000 | $ 30,000,000 | $ 32,000,000 | $ 30,000,000 | $ 29,000,000 |  | $ 26,000,000 |

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