DERIVATIVES AND HEDGING ACTIVITIES Schedule of Interest Rate Derivative Activity (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative [Line Items]
Notional Amount Of Derivative Instrument, Terminated							$ 0	$ 55
Notional Amount Of Derivative Instrument, Undesignated							0	0
Notional Amount Of Derivative Instrument, Issued							$ 0	$ 0
Interest Rate Swap | Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount Of Derivative Instrument, Undesignated	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Fair Value Hedging | Interest Rate Swap | Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount Of Derivative Instrument, Terminated	0	0	0	0	0	55
Notional Amount Of Derivative Instrument, Issued	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0