v3.26.1
PENSION AND POST-RETIREMENT BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Pension Plans | U.S.      
Components of net periodic benefit cost:      
Service cost $ 34 $ 35 $ 35
Interest cost 53 51 46
Expected return on assets (52) (50) (54)
Amortization of:      
Actuarial loss (gain) 21 20 4
Prior service cost 1 0 1
Settlements and curtailments 0 0 0
Special termination benefits 0 0 0
Net periodic benefit cost $ 57 $ 56 $ 32
Assumptions used to determine benefit obligations at June 30      
Weighted-average discount rate (as a percent) 0.0573 0.0583 0.0568
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) 0.0583 0.0568 0.0529
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) 5.20% 5.30% 5.50%
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) 5.30% 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
Pension Plans | U.S. | Maximum      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 5.80% 5.90% 5.70%
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) 5.90% 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
Pension Plans | International      
Components of net periodic benefit cost:      
Service cost $ 28 $ 28 $ 26
Interest cost 18 18 19
Expected return on assets (27) (26) (25)
Amortization of:      
Actuarial loss (gain) (1) (6) (8)
Prior service cost (1) 0 (1)
Settlements and curtailments 1 0 0
Special termination benefits 3 3 1
Net periodic benefit cost $ 21 $ 17 $ 12
Assumptions used to determine benefit obligations at June 30      
Weighted-average discount rate (as a percent) 0.0359 0.0316 0.0350
Weighted-average rate of compensation increase (as a percent) 0.0276 0.0282 0.0300
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Weighted-average discount rate (as a percent) 0.0316 0.0350 0.0369
Weighted-average expected return on assets (as a percent) 0.0414 0.0413 0.0406
Weighted-average rate of compensation increase (as a percent) 0.0282 0.0300 0.0308
Pension Plans | International | Minimum      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 1.50% 1.00% 1.75%
Rate of compensation increase (as a percent) 1.50% 1.50% 1.50%
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Discount rate (as a percent) 1.00% 1.75% 1.00%
Expected return on assets (as a percent) 2.75% 2.75% 2.25%
Rate of compensation increase (as a percent) 1.50% 1.50% 1.75%
Pension Plans | International | Maximum      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 9.75% 10.25% 10.00%
Rate of compensation increase (as a percent) 4.75% 5.00% 5.00%
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Discount rate (as a percent) 10.25% 10.00% 9.00%
Expected return on assets (as a percent) 10.25% 10.00% 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 $ 1 $ 2
Interest cost 8 8 8
Expected return on assets 0 0 (1)
Amortization of:      
Actuarial loss (gain) 0 0 0
Prior service cost (5) (6) (3)
Settlements and curtailments 0 0 0
Special termination benefits 0 0 0
Net periodic benefit cost $ 4 $ 3 $ 6
Assumptions used to determine benefit obligations at June 30      
Weighted-average discount rate (as a percent) 0.0542 0.0559 0.0551
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Expected return on assets (as a percent)     6.25%
Weighted-average discount rate (as a percent) 0.0559 0.0551 0.0519
Weighted-average expected return on assets (as a percent)     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% 5.00%
Other than Pension Plans | Maximum      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 8.50% 10.25% 11.00%
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Discount rate (as a percent) 10.25% 11.00% 10.75%