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 9 Months Ended
Jan. 04, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
OPEB contributions   $ 22   $ 27  
Pension Plan          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Service cost   14 $ 5 42 $ 16
Interest cost   26 20 78 43
Expected return on plan assets   (89) (38) (269) (93)
Prior service credits   1 1 1 1
Net actuarial loss   8 8 24 21
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total   (40) (4) (124) (12)
Defined benefit pension contributions $ 118 1 1 154 5
Other Postretirement Benefit Plans, Defined Benefit          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Service cost   13 1 38 3
Interest cost   19 4 56 11
Expected return on plan assets   (10) (4) (30) (13)
Prior service credits   (2) (1) (2) (2)
Net actuarial loss   1 1 3 2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total   $ 21 1 $ 65 1
OPEB contributions     $ 0   $ 0