DERIVATIVES (Details) - USD ($) |
Mar. 31, 2018 |
Dec. 31, 2017 |
---|---|---|
Derivative [Line Items] | ||
Aggregate notional amount of interest rate swaps | $ 825,000,000 | $ 825,000,000 |
Face value of medium-term notes | (15,000,000) | $ (7,000,000) |
Fair Value Hedging | ||
Derivative [Line Items] | ||
Aggregate notional amount of interest rate swaps | 825,000,000 | |
Cash Flow Hedging | ||
Derivative [Line Items] | ||
Aggregate notional amount of interest rate swaps | $ 15,530,000 |