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EMPLOYEE BENEFIT PLANS - Schedule of Change in Benefit Obligation and Plan Assets, and Funded Status (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Amounts included in the balance sheet:      
Other non-current assets $ 43 $ 554  
Post-employment and other benefit liabilities (380) (524)  
Pension Plan      
Change in Benefit Obligation      
Benefit obligation at beginning of year 3,224 2,885  
Service cost 27 29 $ 31
Interest cost 37 52 67
Actuarial (gain) loss (112) 239  
Benefits paid (106) (116)  
Curtailment, settlements and special termination benefits (54) (16)  
Other (48) 151  
Liabilities held for sale (2,062) 0  
Benefit obligation at end of year 906 3,224 2,885
Change in Plan Assets      
Fair value at beginning of year 3,294 2,953  
Actual return on plan assets 67 285  
Company contributions 47 41  
Benefits paid (106) (116)  
Settlements (54) (15)  
Other, including expenses paid (34) 146  
Assets held for sale (2,623) 0  
Fair value of assets end of year 591 3,294 2,953
Funded Status      
Fair value of plan assets 591 3,294 2,953
Benefit obligations (906) (3,224) $ (2,885)
Funded status of plans (315) 70  
Amounts included in the balance sheet:      
Other non-current assets 43 542  
Accrued compensation and benefits (10) (10)  
Post-employment and other benefit liabilities (348) (462)  
Net amount recognized $ (315) $ 70