v3.10.0.1
DEBT (Details) - USD ($)
May 01, 2018
Jun. 30, 2018
Dec. 31, 2017
Debt      
Debt instrument unused and available borrowing capacity amount   $ 3,499,000,000  
Maximum borrowing capacity   5,515,000,000  
Carrying Value      
Debt      
Long-term debt, including current portion   5,617,000,000 $ 4,175,000,000
Fair value | Level 2      
Debt      
Long-term debt, including current portion   5,649,000,000 $ 4,337,000,000
Commercial paper program      
Debt      
Commercial paper, outstanding issuances   529,000,000  
Liquidity facility      
Debt      
Credit facility, borrowings outstanding   0  
Revolving credit facility      
Debt      
Credit facility, borrowings outstanding   $ 100,000,000  
Current borrowing capacity $ 700,000,000    
Term 5 years    
Additional borrowing capacity $ 100,000,000