OTHER CURRENT ASSETS - MARKETABLE SECURITIES AND OTHER SHORT-TERM INVESTMENTS (Details) - USD ($) $ in Millions |
Sep. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Marketable Securities and Other Short-Term Investments | ||
| Marketable securities and other short-term investments | $ 119 | $ 213 |
| Marketable securities at fair value | 101 | |
| Other short-term investments | 18 | 1 |
| Available for sale securities | 3 | |
| Trading | 209 | |
| Foreign government securities | ||
| Marketable Securities and Other Short-Term Investments | ||
| Marketable securities and other short-term investments | 35 | 145 |
| Corporate debt securities | ||
| Marketable Securities and Other Short-Term Investments | ||
| Marketable securities and other short-term investments | 65 | 59 |
| Certificates of deposit/time deposits | ||
| Marketable Securities and Other Short-Term Investments | ||
| Marketable securities and other short-term investments | 13 | 0 |
| Other | ||
| Marketable Securities and Other Short-Term Investments | ||
| Marketable securities and other short-term investments | $ 6 | $ 9 |