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EMPLOYEE BENEFITS - Postretirement Benefits (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
HRA credit inflation index for grandfathered retirees 4.50%    
Fixed Income Securities      
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Target allocation, percentage 65.00%    
Equity Securities      
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Target allocation, percentage 35.00%    
Postretirement Benefits      
Postretirement Benefits      
Service cost $ 4 $ 5 $ 5
Interest cost 4 3 6
Expected return on assets (8) (8) (8)
Amortization of prior service credits (10) (9) (10)
Amortization of unrecognized gains (9) (8) (5)
Net periodic (benefits) costs (19) (17) (12)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 153 167  
Service cost 4 5 5
Interest cost 4 3 6
Plan participants' contributions 3 3  
Actuarial gains (40) (14)  
Benefits paid (12) (11)  
Benefit obligation at end of year 112 153 167
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Plan assets available for benefits at beginning of year 207 206  
Actual returns on plan assets (36) 9  
Plan participants' contributions 3 3  
Benefits paid (12) (11)  
Plan assets available for benefits at end of year 162 207 $ 206
Noncurrent postretirement benefit asset 50 54  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]      
Prior service credit 33 42  
Unrecognized gains 77 90  
Deferred tax liability (28) (33)  
Net accumulated gains $ 82 $ 99  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate 2.57% 2.17% 3.01%
Long-term rate of return on plan assets – net of tax 4.04% 4.04% 4.04%
Pre age 65 6.50% 5.81% 6.06%
Ultimate healthcare cost trend rate 4.50% 4.50% 4.50%
Year ultimate healthcare cost trend rate reached 2030 2026 2026
HRA credit inflation index for grandfathered retirees 0.00% 0.00% 2.50%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Discount rate 4.92% 2.57% 2.17%
Expected long-term rate of return on plan assets – net of tax 4.04% 4.04% 4.04%
Pre age 65 7.50% 6.50% 5.81%
Year ultimate healthcare cost trend rate reached 2033 2030 2026
HRA credit inflation index for grandfathered retirees 0.00% 0.00% 0.00%
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]      
2023 $ 9    
2024 9    
2025 9    
2026 9    
2027 9    
2028-2032 41    
Total $ 86