2.2.0.25falsefalse1180 - Disclosure - SUBSEQUENT EVENTStruefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $D2011Q1http://www.sec.gov/CIK0000873364duration2011-01-01T00:00:002011-03-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDPerShareDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0ceph_SubsequentEventsDisclosureAbstractcephfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSUBSEQUENT EVENTS3false0us-gaap_ScheduleOfSubsequentEventsTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<table style="font-size:10pt; font-family:'Times New Roman',times,serif;"> <tr> <td> 18.  SUBSEQUENT EVENTS   Gemin X Pharmaceuticals   In April 2011, we acquired all of the outstanding capital stock of Gemin X Pharmaceuticals, Inc., a privately-held biopharmaceutical company developing first-in-class cancer therapeutics, for $225 million cash on a cash-free, debt-free basis. Gemin X stockholders could also receive up to $300 million in cash payments upon the achievement of certain regulatory and sales milestones. There are no royalty obligations to Gemin X stockholders. The initial accounting for the acquisition is incomplete as of the date of this filing.   Teva Pharmaceuticals Merger Agreement   In early May 2011, we announced together with Teva Pharmaceutical Industries Ltd. (Teva) that our companies respective Boards of Directors have unanimously approved an Agreement and a Plan of Merger (the Merger Agreement) under which Teva will acquire all of the outstanding shares of Cephalon for $81.50 per share in cash.  The transaction, which is not conditioned on financing, is subject to the satisfaction of customary closing conditions, including expiration of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act and clearance by the European Commission under the EC Merger Regulation, as well as the approval of Cephalon stockholders.  The transaction is expected to be completed in the third quarter of 2011.  </td></tr></table> 18.  SUBSEQUENT EVENTS   Gemin X Pharmaceuticals   In April 2011, we acquired all of the outstanding capital stock of Gemin XfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescribes disclosed significant events or transactions that occurred after the balance sheet date, but before the issuance of the financial statements. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, losses resulting from fire or flood, losses on receivables, significant realized and unrealized gains and losses that result from changes in quoted market prices of securities, declines in market prices of inventory, changes in authorized or issued debt (SEC), significant foreign exchange rate changes, substantial loans to insiders or affiliates, significant long-term investments, and substantial dividends not in the ordinary course of business.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 11 falsefalseSUBSEQUENT EVENTS12SUBSEQUENT EVENTSUnKnownUnKnownUnKnownUnKnownfalsetrue