DERIVATIVES - Narrative (Details) - Not Designated as Hedging Instrument [Member] $ in Billions	Dec. 31, 2016 USD ($)
Short [Member]
Derivative [Line Items]
Derivative liability, notional amount	$ 3.5
Long [Member]
Derivative [Line Items]
Derivative liability, notional amount	2.1
Long [Member] | Accrued Expenses and Other Liabilities [Member]
Derivative [Line Items]
Derivative liability, notional amount	$ 0.5