v3.20.1
DEBT (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Debt    
Short-term debt $ 736,000,000 $ 771,000,000
Debt instrument unused and available borrowing capacity amount 4,315,000,000  
Maximum borrowing capacity 4,315,000,000  
Carrying Value    
Debt    
Long-term debt, including current portion 4,262,000,000 4,223,000,000
Fair Value | Level 2    
Debt    
Long-term debt, including current portion 4,201,000,000 $ 4,319,000,000
Bilateral credit lines    
Debt    
Short-term debt 0  
Local bank line of credit    
Debt    
Short-term debt 736,000,000  
Commercial paper program    
Debt    
Commercial paper, outstanding issuances 0  
Liquidity facility    
Debt    
Credit facility, borrowings outstanding $ 0