Annual report pursuant to Section 13 and 15(d)

MARKETABLE SECURITIES (Details)

v3.8.0.1
MARKETABLE SECURITIES (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Schedule of Available-for-sale Securities      
Cost $ 195 $ 260  
Gross unrealized gains/(losses) 3    
Estimated fair value 198 260  
Proceeds from sales and maturities of marketable securities 266 306 $ 270
Gross realized gains from the sale of available-for-sale securities [1] 0 0 $ 1
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]      
1 year or less 182    
1-5 years 1    
Total 183    
Debt mutual funds      
Schedule of Available-for-sale Securities      
Cost 170 132  
Gross unrealized gains/(losses) 0 0  
Bank debentures      
Schedule of Available-for-sale Securities      
Cost 0 114  
Gross unrealized gains/(losses) 0 0  
Equity Mutual Funds      
Schedule of Available-for-sale Securities      
Cost 12 12  
Gross unrealized gains/(losses) 3 0  
Certificates of Deposit      
Schedule of Available-for-sale Securities      
Cost 12 0  
Gross unrealized gains/(losses) 0 0  
Government debt securities-non-U.S.      
Schedule of Available-for-sale Securities      
Cost 1 2  
Gross unrealized gains/(losses) 0 0  
Significant other observable inputs Level 2 | Debt mutual funds      
Schedule of Available-for-sale Securities      
Estimated fair value [2] 170 132  
Significant other observable inputs Level 2 | Bank debentures      
Schedule of Available-for-sale Securities      
Estimated fair value [2] 0 114  
Significant other observable inputs Level 2 | Equity Mutual Funds      
Schedule of Available-for-sale Securities      
Estimated fair value [2] 15 12  
Significant other observable inputs Level 2 | Certificates of Deposit      
Schedule of Available-for-sale Securities      
Estimated fair value [2] 12 0  
Significant other observable inputs Level 2 | Government debt securities-non-U.S.      
Schedule of Available-for-sale Securities      
Estimated fair value [2] $ 1 $ 2  
Minimum | Bank debentures      
Schedule of Available-for-sale Securities      
Maturities of Time Deposits, Description P3M    
Maximum | Bank debentures      
Schedule of Available-for-sale Securities      
Maturities of Time Deposits, Description P5Y    
[1] Gross realized losses from the sale of available-for-sale securities were immaterial.
[2] All marketable securities are classified as Level 2 securities. The fair value of Level 2 securities is estimated using actively quoted prices for similar instruments from brokers and observable inputs where available, including market transactions and third-party pricing services, or net asset values provided to investors. We do not currently have any Level 3 securities and there were no transfers between Level 2 or 3 during 2017 or 2016.