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PENSION AND POST-RETIREMENT BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 3 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Pension Plans | U.S.    
Components of net periodic benefit cost:    
Service cost $ 12 $ 11
Interest cost 8 8
Expected return on plan assets (14) (13)
Amortization of:    
Actuarial loss 4 5
Special termination benefits 0 0
Net periodic benefit cost 10 11
Pension Plans | International    
Components of net periodic benefit cost:    
Service cost 8 9
Interest cost 3 2
Expected return on plan assets (4) (3)
Amortization of:    
Actuarial loss 0 1
Special termination benefits 2 2
Net periodic benefit cost 9 11
Employer contributions 6  
Other than Pension Plans Post-retirement    
Components of net periodic benefit cost:    
Service cost 1 0
Interest cost 1 1
Expected return on plan assets 0 0
Amortization of:    
Actuarial loss 0 0
Special termination benefits 0 0
Net periodic benefit cost $ 2 $ 1