ALLIANCES (F-Star) (Details) - In-process research and development [Member] $ in Millions	12 Months Ended
Dec. 31, 2017 USD ($)
Alliances Statement [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 75
F-Star [Member]
Alliances Statement [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 75

Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275

Name:	us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration