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PENSION AND OTHER POSTRETIREMENT BENEFIT PROGRAMS - Net Periodic Benefit Cost Relating to Pension and Other Postemployment Employee Benefit Plans (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
May 31, 2022
Net periodic benefit cost          
Projected benefit obligation         $ 11
Pension benefits          
Net periodic benefit cost          
Service cost $ 19 $ 22 $ 59 $ 66  
Interest cost 25 18 73 54  
Expected return on plan assets (39) (36) (118) (108)  
Amortization of net losses and prior service costs 11 23 34 69  
Net periodic pension cost (income) 16 27 48 81  
OPEB          
Net periodic benefit cost          
Interest cost 1 1 3 3  
Amortization of net losses and prior service costs (3) (2) (9) (7)  
Net periodic pension cost (income) $ (2) $ (1) $ (6) $ (4)