Annual report pursuant to Section 13 and 15(d)

FAIR VALUE - ASSETS AND LIABILITIES MEASURED AT FAIR VALUE ON A RECURRING BASIS (Details)

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FAIR VALUE - ASSETS AND LIABILITIES MEASURED AT FAIR VALUE ON A RECURRING BASIS (Details)
$ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2017
USD ($)
Nov. 30, 2014
item
Mar. 31, 2010
item
Mar. 31, 2015
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2016
USD ($)
Assets:              
Proceeds from termination         $ 7 $ 66  
Cross Currency Interest Rate Contracts | Designated as Hedging Instrument              
Assets:              
Proceeds from termination $ 7     $ 66      
Five years cross currency interest rate contract | Designated as Hedging Instrument              
Assets:              
Number of derivative instruments held | item   2 3        
Term of cross currency interest rate contract   5 years 5 years        
Eight years cross currency interest rate contract | Designated as Hedging Instrument              
Assets:              
Number of derivative instruments held | item   1          
Term of cross currency interest rate contract   8 years          
Recurring basis              
Assets:              
Total assets             $ 74
Liabilities:              
Transfers from Levels 1 to 2 within the fair value hierarchy, assets         0   0
Transfers from Levels 1 and 2 within the fair value hierarchy, liabilities         0   0
Transfers from Levels 2 to 1 within the fair value hierarchy, assets         0   0
Transfers from Levels 2 and 1 within the fair value hierarchy, liabilities         0   0
Recurring basis | Cross Currency Interest Rate Contracts              
Assets:              
Derivatives             29
Recurring basis | Interest rate contracts              
Liabilities:              
Total liabilities         (1)   (2)
Recurring basis | Non-qualified employee benefit plan investments              
Assets:              
Available-for-sale equity securities         33   27
Recurring basis | Investments in equity securities              
Assets:              
Available-for-sale equity securities             18
Recurring basis | Quoted prices in active markets for identical assets (Level 1)              
Assets:              
Total assets             45
Recurring basis | Quoted prices in active markets for identical assets (Level 1) | Non-qualified employee benefit plan investments              
Assets:              
Available-for-sale equity securities         33   27
Recurring basis | Quoted prices in active markets for identical assets (Level 1) | Investments in equity securities              
Assets:              
Available-for-sale equity securities             18
Recurring basis | Significant other observable inputs (Level 2) | Interest rate contracts              
Liabilities:              
Total liabilities         $ (1)   (2)
Recurring basis | Significant unobservable inputs (Level 3)              
Assets:              
Total assets             29
Recurring basis | Significant unobservable inputs (Level 3) | Cross Currency Interest Rate Contracts              
Assets:              
Derivatives             $ 29