Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS - FAIR VALUE OF RECURRING PLAN ASSETS (Details)

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EMPLOYEE BENEFIT PLANS - FAIR VALUE OF RECURRING PLAN ASSETS (Details) - Defined Benefit Plans - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets $ 2,800 $ 2,400  
United States      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 790 697 $ 747
United States | Quoted prices in active markets for identical assets (Level 1)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 503 454  
United States | Significant other observable inputs (Level 2)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 220 178  
United States | Significant unobservable inputs (Level 3)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 67 65  
United States | Recurring basis      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 790 697  
Non-U.S. Defined Benefit Plans      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 1,960 1,751 1,883
Non-U.S. Defined Benefit Plans | Quoted prices in active markets for identical assets (Level 1)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 959 786  
Non-U.S. Defined Benefit Plans | Significant other observable inputs (Level 2)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 944 909  
Non-U.S. Defined Benefit Plans | Significant unobservable inputs (Level 3)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 57 56  
Non-U.S. Defined Benefit Plans | Recurring basis      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 1,960 1,751  
Investments in equity securities | United States | Quoted prices in active markets for identical assets (Level 1)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 283 242  
Investments in equity securities | United States | Significant other observable inputs (Level 2)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 139 107  
Investments in equity securities | United States | Recurring basis      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 422 349  
Investments in equity securities | Non-U.S. Defined Benefit Plans | Quoted prices in active markets for identical assets (Level 1)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 228 161  
Investments in equity securities | Non-U.S. Defined Benefit Plans | Significant other observable inputs (Level 2)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 307 310  
Investments in equity securities | Non-U.S. Defined Benefit Plans | Recurring basis      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 535 471  
Fixed income | United States | Quoted prices in active markets for identical assets (Level 1)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 220 212  
Fixed income | United States | Significant other observable inputs (Level 2)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 81 71  
Fixed income | United States | Recurring basis      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 301 283  
Fixed income | Non-U.S. Defined Benefit Plans | Quoted prices in active markets for identical assets (Level 1)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 560 496  
Fixed income | Non-U.S. Defined Benefit Plans | Significant other observable inputs (Level 2)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 287 251  
Fixed income | Non-U.S. Defined Benefit Plans | Recurring basis      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 847 747  
Real Estate/Other | Significant unobservable inputs (Level 3)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 124 121 $ 117
Real Estate/Other | United States | Significant unobservable inputs (Level 3)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 67 65  
Real Estate/Other | United States | Recurring basis      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 67 65  
Real Estate/Other | Non-U.S. Defined Benefit Plans | Quoted prices in active markets for identical assets (Level 1)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 99 93  
Real Estate/Other | Non-U.S. Defined Benefit Plans | Significant other observable inputs (Level 2)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 349 348  
Real Estate/Other | Non-U.S. Defined Benefit Plans | Significant unobservable inputs (Level 3)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 57 56  
Real Estate/Other | Non-U.S. Defined Benefit Plans | Recurring basis      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 505 497  
Cash | Non-U.S. Defined Benefit Plans | Quoted prices in active markets for identical assets (Level 1)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 72 36  
Cash | Non-U.S. Defined Benefit Plans | Significant other observable inputs (Level 2)      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets 1    
Cash | Non-U.S. Defined Benefit Plans | Recurring basis      
EMPLOYEE BENEFIT PLANS      
Fair value of plan assets $ 73 $ 36