Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS - CHANGE IN BENEFIT OBLIGATION AND PLAN ASSETS (Details)

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EMPLOYEE BENEFIT PLANS - CHANGE IN BENEFIT OBLIGATION AND PLAN ASSETS (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plans          
Change in plan assets          
Fair value of plan assets at beginning of year $ 2,700        
Fair value of plan assets at end of year 2,500 $ 2,700      
Funded status          
Fair value of plan assets 2,700 2,700   $ 2,500 $ 2,700
Defined Benefit Plans | United States          
Change in benefit obligation          
Benefit obligation at beginning of year 1,153 1,049      
Service cost 32 30 $ 30    
Interest cost 44 44 47    
Settlements/transfers/divestitures (6)        
Actuarial (gain) loss (81) 91      
Benefits paid (62) (61)      
Benefit obligation at end of year 1,080 1,153 1,049    
Change in plan assets          
Fair value of plan assets at beginning of year 821 721      
Actual return on plan assets (38) 104      
Settlements/transfers (6)        
Company contributions 52 57      
Benefits paid (62) (61)      
Fair value of plan assets at end of year 767 821 721    
Funded status          
Fair value of plan assets 821 721 721 767 821
Benefit obligation 1,153 1,049 1,049 1,080 1,153
Accrued benefit cost       (313) (332)
Amounts recognized in balance sheet:          
Current liability       (5) (10)
Noncurrent liability       (308) (322)
Total       (313) (332)
Defined Benefit Plans | Non-U.S. Defined Benefit Plans          
Change in benefit obligation          
Benefit obligation at beginning of year 2,259 2,064      
Service cost 32 33 29    
Interest cost 37 35 41    
Participant contributions 5 5      
Plan amendments 4 (1)      
Foreign currency exchange rate changes (74) 207      
Special termination benefits   1      
Settlements/transfers/divestitures (3)        
Actuarial (gain) loss (30) (10)      
Benefits paid (73) (75)      
Benefit obligation at end of year 2,157 2,259 2,064    
Change in plan assets          
Fair value of plan assets at beginning of year 1,883 1,639      
Actual return on plan assets (38) 109      
Foreign currency exchange rate changes (62) 166      
Participant contributions 5 5      
Settlements/transfers (3)        
Company contributions 39 39      
Benefits paid (73) (75)      
Fair value of plan assets at end of year 1,751 1,883 1,639    
Funded status          
Fair value of plan assets 1,883 1,639 1,639 1,751 1,883
Benefit obligation 2,259 2,064 2,064 2,157 2,259
Accrued benefit cost       (406) (376)
Amounts recognized in balance sheet:          
Noncurrent asset       10 22
Current liability       (6) (5)
Noncurrent liability       (410) (393)
Total       (406) (376)
Other Postretirement Benefit Plans | United States          
Change in benefit obligation          
Benefit obligation at beginning of year 80 93      
Service cost 2 3 2    
Interest cost 3 3 4    
Participant contributions 2 2      
Actuarial (gain) loss (9) (12)      
Benefits paid (7) (9)      
Benefit obligation at end of year 71 80 93    
Change in plan assets          
Participant contributions 2 2      
Company contributions 5 7      
Benefits paid (7) (9)      
Funded status          
Benefit obligation $ 80 $ 93 $ 93 71 80
Accrued benefit cost       (71) (80)
Amounts recognized in balance sheet:          
Current liability       (6) (7)
Noncurrent liability       (65) (73)
Total       $ (71) $ (80)