Quarterly report pursuant to Section 13 or 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Pension and Other Postretirement Benefits (Details)

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PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Pension and Other Postretirement Benefits (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Pension Plan        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost $ 7 $ 8 $ 14 $ 16
Interest cost 54 58 109 117
Expected return on plan assets (80) (78) (160) (157)
Prior service credits 4 4 8 8
Net actuarial loss (gain) 0 1 0 2
Net periodic benefit costs (credits) (15) (7) (29) (14)
Defined benefit pension contributions 16 0 16 0
Defined benefit plan        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost 2 3 4 5
Interest cost 13 16 25 32
Expected return on plan assets (10) (10) (21) (21)
Termination benefits 0 0 2 0
Prior service credits (4) (4) (8) (8)
Net actuarial loss (gain) (39) (37) (77) (73)
Net periodic benefit costs (credits) (38) (32) (75) (65)
OPEB contributions $ 0 $ 0 $ 0 $ 0