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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Net Periodic Benefit Cost) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)   $ (34) $ (32) $ 20
Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost   37 26 35
Defined Benefit Plan, Interest Cost   91 80 112
Defined Benefit Plan, Expected Return (Loss) on Plan Assets   (226) (219) (200)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)   (1) (1) (1)
Defined Benefit Plan, Amortization of Gain (Loss)   108 116 110
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment $ (7) 0 (7) 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)   9 (5) 56
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax   (47) (144) 240
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax   1 1 1
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax   (108) (116) (110)
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax   0 7 0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax, Total   (154) (252) 131
Total recognized in net periodic benefit cost and other comprehensive loss or income   (145) (257) 187
Other Postretirement Benefits Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost   1 1 1
Defined Benefit Plan, Interest Cost   3 3 5
Defined Benefit Plan, Expected Return (Loss) on Plan Assets   0 0 0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)   0 0 0
Defined Benefit Plan, Amortization of Gain (Loss)   (9) (4) (6)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment   0 0 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)   (5) 0 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax   (49) (36) 2
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax   0 0 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax   9 4 6
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax   0 0 0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax, Total   (40) (32) 8
Total recognized in net periodic benefit cost and other comprehensive loss or income   $ (45) $ (32) $ 8