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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - RISKS AND UNCERTAINTIES AND RECEIVABLES (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
RISKS AND UNCERTAINTIES |  |  |
Assets | $ 80,064 | $ 107,190 | $ 42,159
Net sales | 17,130 | 19,192 |
Trade receivables, net | 2,115 | $ 4,233 |
Outside North America |  |  |
RISKS AND UNCERTAINTIES |  |  |
Assets | 9,500 |  |
Net sales | $ 3,400 |  |

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