DEBT (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Oct. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2017
Line of Credit Facility [Line Items]
Repayments of debt		$ 400	$ 0
Senior Notes with an Annual Fixed Interest Rate of 3.10% [Member]
Line of Credit Facility [Line Items]
Face value of debt				$ 400
Annual fixed interest rate				3.10%
Effective interest rate				3.13%
Senior notes with an annual fixed interest rate of 5.95% [Member]
Line of Credit Facility [Line Items]
Annual fixed interest rate	5.95%
Repayments of debt	$ 400
Interest Rate Contract [Member]
Line of Credit Facility [Line Items]
Notional amounts				$ 200