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PENSION AND OTHER POSTRETIREMENT BENEFIT PROGRAMS - Reconciliation of Pension and OPEB Plan Obligations, Assets and Funded Status (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Benefit obligations      
End of period $ 4,443    
Fair value of plan assets      
Beginning of period 3,434    
End of period 3,784 $ 3,434  
Amounts recognized in the consolidated balance sheets      
Noncurrent asset 228 155  
Pension benefits      
Benefit obligations      
Beginning of period 4,313 3,973  
Service cost 87 83 $ 74
Interest cost 72 95 172
Participant contributions 4 4  
Actuarial (gain) loss (186) 401  
Benefit payments (103) (109)  
Settlements (13) (271)  
Curtailment (5) (4)  
Acquisitions (364) 0  
Plan Amendments (15) 0  
Foreign exchange and other (105) 141  
End of period 4,443 4,313 3,973
Fair value of plan assets      
Beginning of period 3,434 2,973  
Actual return on plan assets 141 688  
Employer contributions 73 74  
Participant contributions 4 4  
Benefit payments (103) (109)  
Settlements (13) (271)  
Acquisitions 305 0  
Foreign exchange and other (57) 75  
End of period 3,784 3,434 2,973
Funded status (659) (879)  
Amounts recognized in the consolidated balance sheets      
Noncurrent asset 228 155  
Current liability (29) (30)  
Noncurrent liability (858) (1,004)  
Net liability recognized (659) (879)  
OPEB      
Benefit obligations      
Beginning of period 228 228  
Service cost 1 1 1
Interest cost 4 6 8
Participant contributions 0 0  
Actuarial (gain) loss (14) 13  
Benefit payments (19) (20)  
Settlements 0 0  
Curtailment 0 0  
Acquisitions (11) 0  
Plan Amendments 0 0  
Foreign exchange and other 0 0  
End of period 211 228 228
Fair value of plan assets      
Beginning of period 0 0  
Actual return on plan assets 0 0  
Employer contributions 19 20  
Participant contributions 0 0  
Benefit payments (19) (20)  
Settlements 0 0  
Acquisitions 0 0  
Foreign exchange and other 0 0  
End of period 0 0 $ 0
Funded status (211) (228)  
Amounts recognized in the consolidated balance sheets      
Noncurrent asset 0 0  
Current liability (17) (18)  
Noncurrent liability (194) (210)  
Net liability recognized $ (211) $ (228)