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PENSION AND POST-RETIREMENT BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Pension Plans | U.S.        
Components of net periodic benefit cost:        
Service cost $ 11 $ 11 $ 23 $ 22
Interest cost 7 7 15 15
Expected return on plan assets (13) (13) (27) (26)
Amortization of:        
Actuarial loss 3 5 7 10
Prior service cost 0 0 0 0
Special termination benefits 0 0 0 0
Net periodic benefit cost 8 10 18 21
Pension Plans | International        
Components of net periodic benefit cost:        
Service cost 8 9 16 18
Interest cost 2 3 5 5
Expected return on plan assets (3) (3) (7) (6)
Amortization of:        
Actuarial loss 1 1 1 2
Prior service cost (1) 0 (1) 0
Special termination benefits 1 7 3 9
Net periodic benefit cost 8 17 17 28
Employer contributions     11  
Other than Pension Plans Post-retirement        
Components of net periodic benefit cost:        
Service cost 0 0 1 0
Interest cost 2 2 3 3
Expected return on plan assets (1) 0 (1) 0
Amortization of:        
Actuarial loss 1 0 1 0
Prior service cost 0 0 0 0
Special termination benefits 0 0 0 0
Net periodic benefit cost $ 2 $ 2 $ 4 $ 3