DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - Amounts Recognized in Net Income (Details) - Interest expense - net [Member] - Fair value hedging [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amounts recognized in net income	$ 0	$ 0	$ 0	$ 0
Fixed-to-floating interest rate swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts recognized in net income	(16)	8	(59)	(3)
Related long-term debt converted to floating interest rates by interest rate swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts recognized in net income	$ 16	$ (8)	$ 59	$ 3