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EMPLOYEE BENEFIT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]    
Weighted average long-term expected rate or return on plan assets 4.30%  
Other Postretirement Benefits Plan [Member] | Retirement Income Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 0 $ 0
Interest cost 6 6
Expected return on plan assets (4) (5)
Amortization of unrecognized items 2 3
Total 4 4
UNITED STATES | Retirement Income Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Discretionary contributions $ 2 $ 2