DERIVATIVES - Net Investment Hedges (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net investment hedges \| Foreign currency translation adjustment
Derivative gain (losses)
Gain (loss) recognized in AOCI	$ (450)	$ 472	$ 882	$ 177

Amount before tax and reclassification adjustments of other comprehensive income (loss).

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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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