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SIGNIFICANT ACCOUNTING POLICIES - Concentrations of Credit Risk (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) wholesaler | Dec. 31, 2019 USD ($)
Concentrations of Credit Risk |  |
Maximum term of original maturity to classify instruments as cash and cash equivalents (less than) | 3 months |
Percentage of net trade receivables accounted for by largest wholesale customers | 38.00% |
Argentina, Brazil, Egypt, Greece, Serbia, Turkey, Ukraine, Venezuela and Vietnam |  |
Concentrations of Credit Risk |  |
Net trade receivable | $ 166 | $ 156
Past due period for receivables to be negligible (less than) | 90 days |
Period net trade receivable balance outstanding (more than) | 90 days |
Portion of net trade receivables that is past due | $ 2 |
Trade receivables | Three largest U.S. wholesaler customers | Credit concentration |  |
Concentrations of Credit Risk |  |
Number of largest wholesale customers | wholesaler | 3 |

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