v3.22.4
PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Change in Projected Benefit Obligation, Plan Assets and Funded Status) (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, Plan Assets, Amount   $ 2,700 $ 3,600  
Defined Benefit Plan, Plan Assets, Contributions by Employer   3    
Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Benefit Obligation   2,860 3,940 $ 4,229
Defined Benefit Plan, Service Cost   37 26 35
Defined Benefit Plan, Interest Cost   91 80 112
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) $ (87) (826) (112)  
Defined Benefit Plan, Benefit Obligation, Benefits Paid   (265) (263)  
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change   (117) (20)  
Defined Benefit Plan, Plan Assets, Amount   2,679 3,611 3,095
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)   (556) 236  
Defined Benefit Plan, Plan Assets, Contributions by Employer   3 549  
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan   (8) (8)  
Defined Benefit Plan, Plan Assets, Benefits Paid   (265) (263)  
Defined Benefit Plan, Plan Assets, Period Increase (Decrease)   106 (2)  
Defined Benefit Plan, Funded (Unfunded) Status of Plan   (181) (329)  
Liability, Defined Benefit Plan, Current   (2) (2)  
Liability, Defined Benefit Plan, Noncurrent   (179) (327)  
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position   (181) (329)  
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax   1,852 2,007  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax   0 (1)  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax   1,852 2,006  
Other Postretirement Benefits Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Benefit Obligation   128 174 220
Defined Benefit Plan, Service Cost   1 1 1
Defined Benefit Plan, Interest Cost   3 3 5
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)   (48) (37)  
Defined Benefit Plan, Benefit Obligation, Benefits Paid   (2) (13)  
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change   0 0  
Defined Benefit Plan, Plan Assets, Amount   0 0 $ 0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)   0 0  
Defined Benefit Plan, Plan Assets, Contributions by Employer   0 0  
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan   0 0  
Defined Benefit Plan, Plan Assets, Benefits Paid   0 0  
Defined Benefit Plan, Plan Assets, Period Increase (Decrease)   0 0  
Defined Benefit Plan, Funded (Unfunded) Status of Plan   (128) (174)  
Liability, Defined Benefit Plan, Current   (12) (13)  
Liability, Defined Benefit Plan, Noncurrent   (116) (161)  
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position   (128) (174)  
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax   (124) (84)  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax   0 0  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax   $ (124) $ (84)