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ENVIRONMENTAL MATTERS (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accrual for Environmental Loss Contingencies [Roll Forward]      
Beginning of period $ 285    
End of period $ 281 $ 285  
Expected Payment Period of Environmental Contingencies 30 years    
Accrual for Environmental Loss Contingencies [Abstract]      
Accrued Environmental Loss Contingencies, Current $ 20 15  
Accrued Environmental Loss Contingencies, Noncurrent 261 270  
Environmental Costs [Abstract]      
Cash expenditures related to environmental protection and improvement 281 265 $ 244
Environmental capital expenditures 38 42 27
Environmental Remediation [Member]      
Accrual for Environmental Loss Contingencies [Roll Forward]      
Beginning of period 257 260  
Changes in estimates recorded to earnings and other 9 7  
Cash reductions (13) (10)  
End of period 253 257 $ 260
Shared Sites [Member]      
Site Contingency [Line Items]      
Maximum funding required for environmental shared sites 325    
Amounts paid for Environmental Remediation to Date for Shared Sites 110    
Loss Contingency, Estimate of Possible Loss 200    
Environmental ARO [Member]      
Site Contingency [Line Items]      
Best Estimate Accrued to-date For Asset Retirement Obligation 28 28  
Non Environmental ARO [Member]      
Site Contingency [Line Items]      
Best Estimate Accrued to-date For Asset Retirement Obligation 51 51  
Minimum [Member] | Environmental Remediation [Member]      
Site Contingency [Line Items]      
Loss Contingency, Estimate of Possible Loss 253 257  
Maximum [Member] | Environmental Remediation [Member]      
Site Contingency [Line Items]      
Loss Contingency, Estimate of Possible Loss $ 473 $ 501