EMPLOYEE BENEFIT PLANS - Reconciliation of the Projected Benefit Obligations, Plan Assets, Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Retirement Benefits [Abstract]
Defined Benefit Plan Net Periodic Benefit Cost Credit Interest Cost Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag	Consolidated Financial Statements	Consolidated Financial Statements	Consolidated Financial Statements
Change in benefit obligation
Benefit obligation—July 1	$ 404.6	$ 397.0
Service cost	5.6	5.4	$ 9.9
Interest cost	15.0	13.3	7.2
Plan participants’ contributions	1.6	1.3
Benefits paid	(18.6)	(17.8)
New employees transfers (out)/in	(0.8)	1.0
Premiums paid	(0.6)	(0.5)
Pension curtailment	(0.1)	(0.7)
Other	0.0	16.2
Pension settlement	(0.1)	(4.2)
Actuarial loss (gain)	4.1	(20.7)
Effect of exchange rates	(5.5)	14.3
Benefit obligation—June 30	405.2	404.6	397.0
Change in plan assets
Fair value of plan assets—July 1	121.0	101.5
Actual return on plan assets	8.6	1.5
Employer contributions	18.2	16.9
Plan participants’ contributions	1.7	1.3
Benefits paid	(18.6)	(17.8)
New employees transfers (out)/in	(0.8)	1.0
Premiums paid	(0.6)	(0.5)
Plan settlements	(0.1)	(4.2)
Other	0.0	16.2
Effect of exchange rates	(1.2)	5.1
Fair value of plan assets—June 30	128.2	121.0	101.5
Funded status	(277.0)	(283.6)
Pension Plans
Change in benefit obligation
Actuarial loss (gain)	(8.6)	(17.4)
Other Post-Employment Benefits
Change in benefit obligation
Benefit obligation—July 1	36.0	38.8
Service cost	0.5	0.6	0.8
Interest cost	1.5	1.7	0.8
Plan participants’ contributions	0.1	0.2
Benefits paid	(1.8)	(1.9)
New employees transfers (out)/in	0.0	0.0
Premiums paid	0.0	0.0
Pension curtailment	0.0	0.0
Other	0.0	0.0
Pension settlement	0.0	0.0
Actuarial loss (gain)	(4.5)	(3.3)
Effect of exchange rates	(0.1)	(0.1)
Benefit obligation—June 30	31.7	36.0	38.8
Change in plan assets
Fair value of plan assets—July 1	0.1	0.0
Actual return on plan assets	0.0	0.0
Employer contributions	1.7	1.8
Plan participants’ contributions	0.2	0.2
Benefits paid	(1.8)	(1.9)
New employees transfers (out)/in	0.0	0.0
Premiums paid	0.0	0.0
Plan settlements	0.0	0.0
Other	0.0	0.0
Effect of exchange rates	0.0	0.0
Fair value of plan assets—June 30	0.2	0.1	0.0
Funded status	(31.5)	(35.9)
United States | Pension Plans
Change in benefit obligation
Benefit obligation—July 1	13.0	14.5
Service cost	0.0	0.0	0.0
Interest cost	0.7	0.7	0.5
Plan participants’ contributions	0.0	0.0
Benefits paid	(1.3)	(1.4)
New employees transfers (out)/in	0.0	0.0
Premiums paid	0.0	0.0
Pension curtailment	0.0	0.0
Other	0.0	0.0
Pension settlement	0.0	0.0
Actuarial loss (gain)	0.1	(0.8)
Effect of exchange rates	0.0	0.0
Benefit obligation—June 30	12.5	13.0	14.5
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	1.3	1.4
Plan participants’ contributions	0.0	0.0
Benefits paid	(1.3)	(1.4)
New employees transfers (out)/in	0.0	0.0
Premiums paid	0.0	0.0
Plan settlements	0.0	0.0
Other	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	(12.5)	(13.0)
Fair value of plan assets	0.0	0.0
International | Pension Plans
Change in benefit obligation
Benefit obligation—July 1	355.6	343.7
Service cost	5.1	4.8	9.1
Interest cost	12.8	10.9	5.9
Plan participants’ contributions	1.5	1.1
Benefits paid	(15.5)	(14.5)
New employees transfers (out)/in	(0.8)	1.0
Premiums paid	(0.6)	(0.5)
Pension curtailment	(0.1)	(0.7)
Other	0.0	16.2
Pension settlement	(0.1)	(4.2)
Actuarial loss (gain)	8.5	(16.6)
Effect of exchange rates	(5.4)	14.4
Benefit obligation—June 30	361.0	355.6	343.7
Change in plan assets
Fair value of plan assets—July 1	120.9	101.5
Actual return on plan assets	8.6	1.5
Employer contributions	15.2	13.7
Plan participants’ contributions	1.5	1.1
Benefits paid	(15.5)	(14.5)
New employees transfers (out)/in	(0.8)	1.0
Premiums paid	(0.6)	(0.5)
Plan settlements	(0.1)	(4.2)
Other	0.0	16.2
Effect of exchange rates	(1.2)	5.1
Fair value of plan assets—June 30	128.0	120.9	$ 101.5
Funded status	(233.0)	(234.7)
Fair value of plan assets	112.2	$ 106.2
International | Pension Plans | P & G Plans
Change in plan assets
Fair value of plan assets	$ 16.2