EMPLOYEE BENEFIT PLANS - Schedule of Assumptions (Details)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.50%	5.00%	5.00%
Minimum
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Health care cost trend rate assumed for next year	7.50%	6.80%	7.10%
Minimum | Other Post-Employment Benefits
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rates	1.50%	1.70%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rates	1.70%	1.70%	2.30%
Maximum
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Health care cost trend rate assumed for next year	7.60%	7.60%	8.00%
Maximum | Other Post-Employment Benefits
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rates	2.80%	2.80%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rates	2.80%	3.50%	4.20%
U.S. | Pension Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rates			4.00%
U.S. | Minimum | Pension Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rates	2.40%	2.50%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rates	2.50%	3.20%
U.S. | Maximum | Pension Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rates	2.60%	2.80%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rates	2.80%	3.60%
International | Minimum | Pension Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rates	0.30%	0.40%
Future compensation growth rates	1.00%	1.00%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rates	0.40%	0.40%	0.60%
Future compensation growth rates	1.50%	1.00%	1.50%
Expected long-term rates of return on plan assets	1.00%	1.40%	2.00%
International | Maximum | Pension Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rates	1.60%	6.70%
Future compensation growth rates	2.50%	5.80%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rates	6.70%	8.40%	8.00%
Future compensation growth rates	6.70%	5.80%	5.70%
Expected long-term rates of return on plan assets	5.80%	8.90%	8.40%