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, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Pension Plan        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost $ 8 $ 12 $ 16 $ 24
Interest cost 58 31 117 63
Expected return on plan assets (78) (92) (157) (184)
Prior service credits 4 0 8 0
Net actuarial loss (gain) 1 3 2 7
Net periodic benefit costs (credits) (7) (46) (14) (90)
Defined benefit pension contributions 0 0 0 0
Other Postretirement Benefit Plans, Defined Benefit        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost 3 10 5 21
Interest cost 16 20 32 40
Expected return on plan assets (10) (9) (21) (19)
Prior service credits (4) 0 (8) 0
Net actuarial loss (gain) (37) (3) (73) (6)
Net periodic benefit costs (credits) (32) 18 (65) 36
OPEB contributions $ 0 $ 28 $ 0 $ 56