SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - GOODWILL (Details)
$ in Millions
|12 Months Ended|
Dec. 31, 2017
|Foreign currency exchange rate changes||$ 3|
Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.
Reference 1: http://www.xbrl.org/2003/role/presentationRef