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SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition, Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Cooperative advertising credits included in rebates | $ 1,863 | $ 1,813 | $ 2,050
Settlement period for cash discounts and allowances | 1 month |  |
1% change in estimated return rates, Impact on pre-tax earnings | $ 81 |  |
Sales return provisions | 5,428 | 5,036 |
1% change in volume of product sold through to Medicaid plan participants, Impact on pre-tax earnings | 76 |  |
Price appreciation credits | 8,434 | 8,027 | 8,601
Price Appreciation Credit |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Price appreciation credits | $ 17 | 15 |
Minimum |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Payment terms | 30 days |  |
Maximum |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Payment terms | 90 days |  |
Rebates, Advertising Credits Portion |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Cooperative advertising credits included in rebates | $ 36 | 32 |
Returns |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Cooperative advertising credits included in rebates | 482 | 575 | $ 691
Sales return provisions | 131 | 120 |
Reduction in variable consideration provision, adjustment | $ 28 | $ 38 |

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