EMPLOYEE BENEFIT PLANS - Reconciliation of the Projected Benefit Obligations, Plan Assets, Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
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	$ 397.0	$ 585.0
Service cost	5.4	9.9	$ 19.4
Interest cost	13.3	7.2	10.2
Plan participants’ contributions	1.3	1.7
Benefits paid	(17.8)	(19.4)
New employees transfers in	1.0	4.2
Premiums paid	(0.5)	(0.5)
Pension curtailment	(0.7)	(1.6)
Other	16.2	0.0
Pension settlement	(4.2)	(39.3)
Actuarial loss (gain)	(20.7)	(100.5)
Effect of exchange rates	14.3	(49.7)
Benefit obligation—June 30	404.6	397.0	585.0
Change in plan assets
Fair value of plan assets—July 1	101.5	159.1
Actual return on plan assets	1.5	(11.6)
Employer contributions	16.9	19.8
Plan participants’ contributions	1.3	1.7
Benefits paid	(17.8)	(19.4)
New employees transfers in	1.0	4.2
Premiums paid	(0.5)	(0.5)
Plan settlements	(4.2)	(39.1)
Other	16.2	0.0
Effect of exchange rates	5.1	(12.7)
Fair value of plan assets—June 30	121.0	101.5	159.1
Funded status	(283.6)	(295.5)
Pension Plans
Change in benefit obligation
Actuarial loss (gain)	(17.4)	(89.6)
Other Post-Employment Benefits
Change in benefit obligation
Benefit obligation—July 1	38.8	50.2
Service cost	0.6	0.8	1.0
Interest cost	1.7	0.8	1.3
Plan participants’ contributions	0.2	0.2
Benefits paid	(1.9)	(2.2)
New employees transfers 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)	(3.3)	(10.9)
Effect of exchange rates	(0.1)	(0.1)
Benefit obligation—June 30	36.0	38.8	50.2
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	1.8	2.0
Plan participants’ contributions	0.2	0.2
Benefits paid	(1.9)	(2.2)
New employees transfers 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	0.1	0.0	0.0
Funded status	(35.9)	(38.8)
United States | Pension Plans
Change in benefit obligation
Benefit obligation—July 1	14.5	18.9
Service cost	0.0	0.0	0.0
Interest cost	0.7	0.5	0.5
Plan participants’ contributions	0.0	0.0
Benefits paid	(1.4)	(2.1)
New employees transfers 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)	(0.8)	(2.8)
Effect of exchange rates	0.0	0.0
Benefit obligation—June 30	13.0	14.5	18.9
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	1.4	2.1
Plan participants’ contributions	0.0	0.0
Benefits paid	(1.4)	(2.1)
New employees transfers 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	(13.0)	(14.5)
Fair value of plan assets	0.0	0.0
International | Pension Plans
Change in benefit obligation
Benefit obligation—July 1	343.7	515.9
Service cost	4.8	9.1	18.4
Interest cost	10.9	5.9	8.4
Plan participants’ contributions	1.1	1.5
Benefits paid	(14.5)	(15.1)
New employees transfers in	1.0	4.2
Premiums paid	(0.5)	(0.5)
Pension curtailment	(0.7)	(1.6)
Other	16.2	0.0
Pension settlement	(4.2)	(39.3)
Actuarial loss (gain)	(16.6)	(86.8)
Effect of exchange rates	14.4	(49.6)
Benefit obligation—June 30	355.6	343.7	515.9
Change in plan assets
Fair value of plan assets—July 1	101.5	159.1
Actual return on plan assets	1.5	(11.6)
Employer contributions	13.7	15.7
Plan participants’ contributions	1.1	1.5
Benefits paid	(14.5)	(15.1)
New employees transfers in	1.0	4.2
Premiums paid	(0.5)	(0.5)
Plan settlements	(4.2)	(39.1)
Other	16.2	0.0
Effect of exchange rates	5.1	(12.7)
Fair value of plan assets—June 30	120.9	101.5	$ 159.1
Funded status	(234.7)	(242.2)
Fair value of plan assets	106.2	$ 85.3
International | Pension Plans | P & G Plans
Change in plan assets
Fair value of plan assets	$ 16.2