DERIVATIVE FINANCIAL INSTRUMENTS DERIVATIVE FINANCIAL INSTRUMENTS - Cash Flow Hedges (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	$ 308	$ 7
Derivative, Notional Amount	27,415		$ 25,927
Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	19,375		18,387
Loans Payable [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	19,375		18,375
Loans Payable [Member] | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$ 19,375		$ 18,375