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