Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS - HEALTH CARE TREND RATES, EFFECTS OF ONE PERCENT CHANGE IN HEALTH CARE COST RATES AND EXPECTED BENEFIT PAYMENTS (Details)

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EMPLOYEE BENEFIT PLANS - HEALTH CARE TREND RATES, EFFECTS OF ONE PERCENT CHANGE IN HEALTH CARE COST RATES AND EXPECTED BENEFIT PAYMENTS (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Health care trend rate    
Health care trend rate (as a percent) 6.50% 6.50%
Ultimate health care trend rate (as a percent) 5.00% 5.00%
Effects of one-percent-point change in assumed health care cost trend rates    
Effect on postretirement benefit obligation, Increase $ 2  
Effect on postretirement benefit obligation, Decrease (1)  
Expected benefit payments:    
Net transfer out of Level 3 assets due to a change in the significance of unobservable inputs for several investments 0  
Net transfer in to Level 3 assets due to a change in the significance of unobservable inputs for several investments 0  
Defined Benefit Plans | United States    
Projected benefit obligation in excess of plan assets    
Projected benefit obligation 1,024 $ 956
Fair value of plan assets 790 697
Accumulated benefit obligation in excess of plan assets    
Projected benefit obligation 1,024 956
Accumulated benefit obligation 1,019 935
Fair value of plan assets 790 697
2020 expected employer contributions    
To plan trusts 45  
Expected benefit payments:    
2020 59  
2021 62  
2022 65  
2023 69  
2024 98  
2025 - 2029 325  
Defined Benefit Plans | Non-U.S. Defined Benefit Plans    
Projected benefit obligation in excess of plan assets    
Projected benefit obligation 2,203 1,790
Fair value of plan assets 1,777 1,375
Accumulated benefit obligation in excess of plan assets    
Projected benefit obligation 1,066 986
Accumulated benefit obligation 991 919
Fair value of plan assets 664 $ 608
2020 expected employer contributions    
To plan trusts 38  
Expected benefit payments:    
2020 78  
2021 77  
2022 81  
2023 85  
2024 84  
2025 - 2029 447  
Other Postretirement Benefit Plans | United States    
2020 expected employer contributions    
To plan trusts 5  
Expected benefit payments:    
2020 5  
2021 5  
2022 5  
2023 5  
2024 5  
2025 - 2029 $ 24