USE OF DERIVATIVES, OFFSETTING DISCLOSURES AND CHANGES IN OTHER COMPREHENSIVE INCOME BY COMPONENT - Additional Information (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2018 |
Dec. 31, 2010 |
|
| Derivative Instruments and Hedging Activities Disclosures [Line Items] | ||
| SWAP agreement notional amount during period | $ 500 | $ 100 |
| SWAP agreement average interest rate during period | 2.44% | 4.09% |
| Swap agreement notional amount expiring during period | $ 1,700 | |
| SWAP agreement average interest rate expiring during period | 0.76% | |
| Interest Rate Swap Agreements [Member] | ||
| Notional Disclosures [Abstract] | ||
| Payment term of LIBOR interest rate agreement | 20 years |