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