EMPLOYEE BENEFIT PLANS - Reconciliation of the Projected Benefit Obligations, Plan Assets, Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Change in benefit obligation
Benefit obligation—July 1	$ 585.0	$ 825.4
Service cost	9.9	19.4	$ 34.2
Interest cost	7.2	10.2	11.4
Plan participants’ contributions	1.7	4.5
Benefits paid	(19.4)	(19.1)
New employees transfers in	4.2	29.7
Premiums paid	(0.5)	(1.3)
Pension curtailment	(1.6)	(6.6)
Acquisitions/Divestitures	0.0	(304.0)
Pension settlement	(39.3)	(47.0)
Actuarial loss (gain)	(100.5)	33.1
Plan combinations	0.0	0.0
Effect of exchange rates	(49.7)	40.7
Benefit obligation—June 30	397.0	585.0	825.4
Change in plan assets
Fair value of plan assets—July 1	159.1	274.6
Actual return on plan assets	(11.6)	24.6
Employer contributions	19.8	28.5
Plan participants’ contributions	1.7	4.5
Benefits paid	(19.4)	(19.1)
New employees transfers in	4.2	29.7
Premiums paid	(0.5)	(1.3)
Plan settlements	(39.1)	(46.5)
Acquisitions/Divestitures	0.0	(149.0)
Effect of exchange rates	(12.7)	13.1
Fair value of plan assets—June 30	101.5	159.1	274.6
Funded status	(295.5)	(425.9)
Pension Plans
Change in benefit obligation
Actuarial loss (gain)	89.6	35.9
Other Post-Employment Benefits
Change in benefit obligation
Benefit obligation—July 1	50.2	53.7
Service cost	0.8	1.0	1.1
Interest cost	0.8	1.3	1.7
Plan participants’ contributions	0.2	0.2
Benefits paid	(2.2)	(2.3)
New employees transfers in	0.0	0.0
Premiums paid	0.0	0.0
Pension curtailment	0.0	0.0
Acquisitions/Divestitures	0.0	(0.6)
Pension settlement	0.0	0.0
Actuarial loss (gain)	(10.9)	(2.8)
Plan combinations	0.0	0.0
Effect of exchange rates	(0.1)	(0.3)
Benefit obligation—June 30	38.8	50.2	53.7
Change in plan assets
Fair value of plan assets—July 1	0.0	0.5
Actual return on plan assets	0.0	0.0
Employer contributions	2.0	2.0
Plan participants’ contributions	0.2	0.2
Benefits paid	(2.2)	(2.3)
New employees transfers in	0.0	0.0
Premiums paid	0.0	0.0
Plan settlements	0.0	0.0
Acquisitions/Divestitures	0.0	(0.4)
Effect of exchange rates	0.0	0.0
Fair value of plan assets—June 30	0.0	0.0	0.5
Funded status	(38.8)	(50.2)
United States | Pension Plans
Change in benefit obligation
Benefit obligation—July 1	18.9	18.5
Service cost	0.0	0.0	0.0
Interest cost	0.5	0.5	0.6
Plan participants’ contributions	0.0	0.0
Benefits paid	(2.1)	(0.6)
New employees transfers in	0.0	0.0
Premiums paid	0.0	0.0
Pension curtailment	0.0	0.0
Acquisitions/Divestitures	0.0	0.0
Pension settlement	0.0	0.0
Actuarial loss (gain)	(2.8)	0.5
Plan combinations	0.0	0.0
Effect of exchange rates	0.0	0.0
Benefit obligation—June 30	14.5	18.9	18.5
Change in plan assets
Fair value of plan assets—July 1	0.0	0.0
Actual return on plan assets	0.0	0.0
Employer contributions	2.1	0.6
Plan participants’ contributions	0.0	0.0
Benefits paid	(2.1)	(0.6)
New employees transfers in	0.0	0.0
Premiums paid	0.0	0.0
Plan settlements	0.0	0.0
Acquisitions/Divestitures	0.0	0.0
Effect of exchange rates	0.0	0.0
Fair value of plan assets—June 30	0.0	0.0	0.0
Funded status	(14.5)	(18.9)
International | Pension Plans
Change in benefit obligation
Benefit obligation—July 1	515.9	753.2
Service cost	9.1	18.4	33.1
Interest cost	5.9	8.4	9.1
Plan participants’ contributions	1.5	4.3
Benefits paid	(15.1)	(16.2)
New employees transfers in	4.2	29.7
Premiums paid	(0.5)	(1.3)
Pension curtailment	(1.6)	(6.6)
Acquisitions/Divestitures	0.0	(303.4)
Pension settlement	(39.3)	(47.0)
Actuarial loss (gain)	(86.8)	35.4
Plan combinations	0.0	0.0
Effect of exchange rates	(49.6)	41.0
Benefit obligation—June 30	343.7	515.9	753.2
Change in plan assets
Fair value of plan assets—July 1	159.1	274.1
Actual return on plan assets	(11.6)	24.6
Employer contributions	15.7	25.9
Plan participants’ contributions	1.5	4.3
Benefits paid	(15.1)	(16.2)
New employees transfers in	4.2	29.7
Premiums paid	(0.5)	(1.3)
Plan settlements	(39.1)	(46.5)
Acquisitions/Divestitures	0.0	(148.6)
Effect of exchange rates	(12.7)	13.1
Fair value of plan assets—June 30	101.5	159.1	$ 274.1
Funded status	$ (242.2)	$ (356.8)