XML 144 R101.htm IDEA: XBRL DOCUMENT v3.20.4
COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Loss Contingency, Classification of Accrual [Abstract]          
Accrued liabilities       $ 225 $ 222
Other liabilities       435 487
Total environmental liabilities $ 660 $ 755 $ 595 $ 660 $ 709
Environmental Matters [Abstract]          
Beginning of period 709 755 595    
Accruals for environmental matters deemed probable and reasonably estimable 173 213 395    
Environmental liability payments (216) (256) (218)    
Other (6) (3) (17)    
End of period $ 660 $ 709 $ 755