DERIVATIVE FINANCIAL INSTRUMENTS - Cash Flow Hedges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	$ (40)	$ 28	$ 279	$ 82
Derivative, Notional Amount	28,671		28,671		$ 25,927
Loans Payable [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$ 18,375		$ 18,375		$ 18,375