PENSION, DEFERRED COMPENSATION AND POST-RETIREMENT BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Pension Plans | U.S.
Components of net periodic benefit cost:
Service cost	$ 35	$ 35	$ 37
Interest cost	51	46	40
Expected return on assets	(50)	(54)	(57)
Amortization of:
Actuarial loss (gain)	20	4	3
Prior service cost	0	1	0
Settlements	0	0	0
Special termination benefits	0	0	0
Net periodic benefit cost	$ 56	$ 32	$ 23
Assumptions used to determine benefit obligations at June 30
Weighted-average discount rate (as a percent)	0.0583	0.0568	0.0529
Assumptions used to determine net periodic benefit cost for the year ended June 30
Expected return on assets (as a percent)	6.25%	6.25%	6.25%
Weighted-average discount rate (as a percent)	0.0568	0.0529	0.0448
Weighted-average expected return on assets (as a percent)	0.0625	0.0625	0.0625
Pension Plans | U.S. | Minimum
Assumptions used to determine benefit obligations at June 30
Discount rate (as a percent)	5.30%	5.50%	5.20%
Rate of compensation increase (as a percent)	2.50%	2.50%	2.50%
Weighted-average rate of compensation increase (as a percent)	0.0250	0.0250	0.0250
Assumptions used to determine net periodic benefit cost for the year ended June 30
Discount rate (as a percent)	5.50%	5.20%	4.30%
Rate of compensation increase (as a percent)	2.50%	2.50%	2.50%
Weighted-average rate of compensation increase (as a percent)	0.0250	0.0250	0.0250
Pension Plans | U.S. | Maximum
Assumptions used to determine benefit obligations at June 30
Discount rate (as a percent)	5.90%	5.70%	5.30%
Rate of compensation increase (as a percent)	8.00%	8.00%	8.00%
Weighted-average rate of compensation increase (as a percent)	0.0800	0.0800	0.0800
Assumptions used to determine net periodic benefit cost for the year ended June 30
Discount rate (as a percent)	5.70%	5.30%	4.50%
Rate of compensation increase (as a percent)	8.00%	8.00%	8.00%
Weighted-average rate of compensation increase (as a percent)	0.0800	0.0800	0.0800
Pension Plans | International
Components of net periodic benefit cost:
Service cost	$ 28	$ 26	$ 27
Interest cost	18	19	15
Expected return on assets	(26)	(25)	(17)
Amortization of:
Actuarial loss (gain)	(6)	(8)	(3)
Prior service cost	0	(1)	(1)
Settlements	0	0	1
Special termination benefits	3	1	0
Net periodic benefit cost	$ 17	$ 12	$ 22
Assumptions used to determine benefit obligations at June 30
Weighted-average discount rate (as a percent)	0.0316	0.0350	0.0369
Weighted-average rate of compensation increase (as a percent)	0.0282	0.0300	0.0308
Assumptions used to determine net periodic benefit cost for the year ended June 30
Weighted-average discount rate (as a percent)	0.0350	0.0369	0.0277
Weighted-average expected return on assets (as a percent)	0.0413	0.0406	0.0295
Weighted-average rate of compensation increase (as a percent)	0.0300	0.0308	0.0296
Pension Plans | International | Minimum
Assumptions used to determine benefit obligations at June 30
Discount rate (as a percent)	1.00%	1.75%	1.00%
Rate of compensation increase (as a percent)	1.50%	1.50%	1.75%
Assumptions used to determine net periodic benefit cost for the year ended June 30
Discount rate (as a percent)	1.75%	1.00%	0.75%
Expected return on assets (as a percent)	2.75%	2.25%	1.25%
Rate of compensation increase (as a percent)	1.50%	1.75%	0.00%
Pension Plans | International | Maximum
Assumptions used to determine benefit obligations at June 30
Discount rate (as a percent)	10.25%	10.00%	9.00%
Rate of compensation increase (as a percent)	5.00%	5.00%	5.00%
Assumptions used to determine net periodic benefit cost for the year ended June 30
Discount rate (as a percent)	10.00%	9.00%	9.00%
Expected return on assets (as a percent)	10.00%	9.00%	9.00%
Rate of compensation increase (as a percent)	5.00%	5.00%	5.00%
Other than Pension Plans
Components of net periodic benefit cost:
Service cost	$ 1	$ 2	$ 1
Interest cost	8	8	8
Expected return on assets	0	(1)	(1)
Amortization of:
Actuarial loss (gain)	0	0	0
Prior service cost	(6)	(3)	0
Settlements	0	0	0
Special termination benefits	0	0	0
Net periodic benefit cost	$ 3	$ 6	$ 8
Assumptions used to determine benefit obligations at June 30
Weighted-average discount rate (as a percent)	0.0559	0.0551	0.0519
Assumptions used to determine net periodic benefit cost for the year ended June 30
Expected return on assets (as a percent)		6.25%	6.25%
Weighted-average discount rate (as a percent)	0.0551	0.0519	0.0468
Weighted-average expected return on assets (as a percent)		0.0625	0.0625
Other than Pension Plans | Minimum
Assumptions used to determine benefit obligations at June 30
Discount rate (as a percent)	5.00%	5.00%	5.00%
Assumptions used to determine net periodic benefit cost for the year ended June 30
Discount rate (as a percent)	5.00%	5.00%	4.50%
Other than Pension Plans | Maximum
Assumptions used to determine benefit obligations at June 30
Discount rate (as a percent)	10.25%	11.00%	10.75%
Assumptions used to determine net periodic benefit cost for the year ended June 30
Discount rate (as a percent)	11.00%	10.75%	9.75%