PENSION, DEFERRED COMPENSATION AND POST-RETIREMENT BENEFIT PLANS - Company's Target Asset Allocation at June 30, 2021 (Details)	Jun. 30, 2021
Pension Plans | U.S.
Company's target asset allocation at June 30, 2021
Target asset allocation (as a percent)	100.00%
Pension Plans | U.S. | Equity
Company's target asset allocation at June 30, 2021
Target asset allocation (as a percent)	42.00%
Pension Plans | U.S. | Debt securities
Company's target asset allocation at June 30, 2021
Target asset allocation (as a percent)	50.00%
Pension Plans | U.S. | Other
Company's target asset allocation at June 30, 2021
Target asset allocation (as a percent)	8.00%
Pension Plans | International
Company's target asset allocation at June 30, 2021
Target asset allocation (as a percent)	100.00%
Pension Plans | International | Equity
Company's target asset allocation at June 30, 2021
Target asset allocation (as a percent)	13.00%
Pension Plans | International | Debt securities
Company's target asset allocation at June 30, 2021
Target asset allocation (as a percent)	63.00%
Pension Plans | International | Other
Company's target asset allocation at June 30, 2021
Target asset allocation (as a percent)	24.00%
Other than Pension Plans
Company's target asset allocation at June 30, 2021
Target asset allocation (as a percent)	100.00%
Other than Pension Plans | Equity
Company's target asset allocation at June 30, 2021
Target asset allocation (as a percent)	42.00%
Other than Pension Plans | Debt securities
Company's target asset allocation at June 30, 2021
Target asset allocation (as a percent)	50.00%
Other than Pension Plans | Other
Company's target asset allocation at June 30, 2021
Target asset allocation (as a percent)	8.00%