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PENSION, DEFERRED COMPENSATION AND POST-RETIREMENT BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Pension Plans | U.S.      
Components of net periodic benefit cost:      
Service cost $ 37 $ 46 $ 45
Interest cost 40 31 31
Expected return on assets (57) (55) (53)
Amortization of:      
Actuarial loss 3 15 20
Prior service cost 0 0 0
Settlements 0 0 0
Special termination benefits 0 0 0
Net periodic benefit cost $ 23 $ 37 $ 43
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%
Pension Plans | U.S. | Minimum      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 5.20% 4.30% 2.50%
Rate of compensation increase (as a percent) 2.50% 2.50% 2.50%
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Discount rate (as a percent) 4.30% 2.50% 2.50%
Rate of compensation increase (as a percent) 2.50% 2.50% 2.50%
Pension Plans | U.S. | Maximum      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 5.30% 4.50% 3.00%
Rate of compensation increase (as a percent) 8.00% 8.00% 8.00%
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Discount rate (as a percent) 4.50% 3.00% 3.00%
Rate of compensation increase (as a percent) 8.00% 8.00% 8.00%
Pension Plans | U.S. | Weighted Average      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 5.29% 4.48%  
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Discount rate (as a percent) 4.48% 2.94%  
Expected return on assets (as a percent) 6.25% 6.25%  
Pension Plans | International      
Components of net periodic benefit cost:      
Service cost $ 27 $ 31 $ 36
Interest cost 15 10 10
Expected return on assets (17) (13) (14)
Amortization of:      
Actuarial loss (3) 2 4
Prior service cost (1) (1) (1)
Settlements 1 0 0
Special termination benefits 0 4 10
Net periodic benefit cost $ 22 $ 33 $ 45
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 3.70% 2.80% 1.60%
Pension Plans | International | Minimum      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 1.00% 0.75% 0.50%
Rate of compensation increase (as a percent) 1.75% 1.50% 1.00%
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Discount rate (as a percent) 0.75% 0.50% 0.50%
Expected return on assets (as a percent) 1.25% 1.25% 1.25%
Rate of compensation increase (as a percent) 0.00% 0.00% 1.00%
Pension Plans | International | Maximum      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 9.00% 9.00% 7.25%
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) 9.00% 7.25% 7.00%
Expected return on assets (as a percent) 9.00% 7.25% 7.00%
Rate of compensation increase (as a percent) 5.00% 5.00% 5.50%
Pension Plans | International | Weighted Average      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 3.69% 2.77%  
Rate of compensation increase (as a percent) 3.08% 2.96%  
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Discount rate (as a percent) 2.77% 1.59%  
Expected return on assets (as a percent) 2.95% 2.19%  
Rate of compensation increase (as a percent) 2.96% 2.81%  
Other than Pension Plans      
Components of net periodic benefit cost:      
Service cost $ 1 $ 2 $ 2
Interest cost 8 6 6
Expected return on assets (1) (1) (1)
Amortization of:      
Actuarial loss 0 1 0
Prior service cost 0 0 0
Settlements 0 0 0
Special termination benefits 0 0 0
Net periodic benefit cost $ 8 $ 8 $ 7
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%
Other than Pension Plans | Minimum      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 5.00% 4.50% 2.70%
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Discount rate (as a percent) 4.50% 2.70% 2.70%
Other than Pension Plans | Maximum      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 10.75% 9.75% 9.00%
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Discount rate (as a percent) 9.75% 9.00% 9.00%
Other than Pension Plans | Weighted Average      
Assumptions used to determine benefit obligations at June 30      
Discount rate (as a percent) 5.19% 4.68%  
Assumptions used to determine net periodic benefit cost for the year ended June 30      
Discount rate (as a percent) 4.68% 2.92%  
Expected return on assets (as a percent) 6.25% 6.25%