2.2.0.25truefalse06021 - Disclosure - Acquisitions (Details 1)truefalseIn Millionsfalse1falsefalseUSDtruefalse{us-gaap_BusinessAcquisitionAxis} : Biovex Group Inc Member
3/4/2011
USD ($)
$BalanceAsOf_04Mar2011_Biovex_Group_Inc_Memberhttp://www.sec.gov/CIK0000318154instant2011-03-04T00:00:000001-01-01T00:00:00falsefalseBioVex Group Inc [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiamgn_BiovexGroupIncMemberus-gaap_BusinessAcquisitionAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2true0us-gaap_BusinessAcquisitionPurchasePriceAllocationAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse3false0us-gaap_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsNotAmortizableus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse675000000675falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will not be amortized. Does not include goodwill.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-Subparagraph e
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 52
-Subparagraph b
falsefalse4false0us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmountus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse170000000170falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 52
-Subparagraph c
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 53
-Subparagraph d
falsefalse5false0amgn_BusinessAcquisitionPurchasePriceAllocationDeferredIncomeTaxesLiabilitiesamgnfalsedebitinstantBusiness acquisition purchase price allocation deferred income taxes liabilities.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse-246000000-246falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryBusiness acquisition purchase price allocation deferred income taxes liabilities.No authoritative reference available.falsefalse6false0amgn_BusinessAcquisitionPurchasePriceAllocationOtherAssetsAndLiabilitiesAcquiredNetamgnfalsedebitinstantBusiness acquisition purchase price allocation other assets and liabilities acquired net.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse-2000000-2falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryBusiness acquisition purchase price allocation other assets and liabilities acquired net.No authoritative reference available.falsefalse7false0us-gaap_BusinessCombinationConsiderationTransferredus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse597000000597falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the acquisition-date fair value of the total consideration transferred which consists of the sum of the acquisition-date fair values of the assets transferred by the acquirer, the liabilities incurred by the acquirer to former owners of the acquiree, and the equity interests issued by the acquirer.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 39, 40
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph f
truefalse16Acquisitions (Details 1) (BioVex Group Inc [Member], USD $)MillionsUnKnownUnKnownUnKnownfalsetrue