PENSION, DEFERRED COMPENSATION AND POST-RETIREMENT BENEFIT PLANS - Company's Target Asset Allocation at June 30, 2018 (Details)	Jun. 30, 2018
Pension Plans | U.S.
Company's target asset allocation at June 30, 2018
Target asset allocation (as a percent)	100.00%
Pension Plans | U.S. | Equity securities
Company's target asset allocation at June 30, 2018
Target asset allocation (as a percent)	44.00%
Pension Plans | U.S. | Debt instruments
Company's target asset allocation at June 30, 2018
Target asset allocation (as a percent)	39.00%
Pension Plans | U.S. | Other
Company's target asset allocation at June 30, 2018
Target asset allocation (as a percent)	17.00%
Pension Plans | International
Company's target asset allocation at June 30, 2018
Target asset allocation (as a percent)	100.00%
Pension Plans | International | Equity securities
Company's target asset allocation at June 30, 2018
Target asset allocation (as a percent)	13.00%
Pension Plans | International | Debt instruments
Company's target asset allocation at June 30, 2018
Target asset allocation (as a percent)	65.00%
Pension Plans | International | Other
Company's target asset allocation at June 30, 2018
Target asset allocation (as a percent)	22.00%
Other than Pension Plans Post-retirement
Company's target asset allocation at June 30, 2018
Target asset allocation (as a percent)	100.00%
Other than Pension Plans Post-retirement | Equity securities
Company's target asset allocation at June 30, 2018
Target asset allocation (as a percent)	44.00%
Other than Pension Plans Post-retirement | Debt instruments
Company's target asset allocation at June 30, 2018
Target asset allocation (as a percent)	39.00%
Other than Pension Plans Post-retirement | Other
Company's target asset allocation at June 30, 2018
Target asset allocation (as a percent)	17.00%