2.2.0.25truefalse06112 - Disclosure - Derivative instruments (Details 2)truefalseIn Millionsfalse1falsefalseUSDtruefalse{us-gaap_DerivativeInstrumentsGainLossByDerivativeInstrumentRiskAxis} : Foreign currency contracts [Member]
{us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxis} : Interest And Other Income [Member]
1/1/2011 - 3/31/2011
USD ($)
$ThreeMonthsEnded_31Mar2011_Interest_And_Other_Income_Member_Foreign_Exchange_Contract_Memberhttp://www.sec.gov/CIK0000318154duration2011-01-01T00:00:002011-03-31T00:00:00falsefalseForeign currency contracts [Member]us-gaap_DerivativeInstrumentsGainLossByDerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignExchangeContractMemberus-gaap_DerivativeInstrumentsGainLossByDerivativeInstrumentRiskAxisexplicitMemberfalsefalseInterest and other income, net [Member]us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxisxbrldihttp://xbrl.org/2006/xbrldiamgn_InterestAndOtherIncomeMemberus-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falsefalseUSDtruefalse{us-gaap_DerivativeInstrumentsGainLossByDerivativeInstrumentRiskAxis} : Foreign currency contracts [Member]
{us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxis} : Interest And Other Income [Member]
1/1/2010 - 3/31/2010
USD ($)
$ThreeMonthsEnded_31Mar2010_Interest_And_Other_Income_Member_Foreign_Exchange_Contract_Memberhttp://www.sec.gov/CIK0000318154duration2010-01-01T00:00:002010-03-31T00:00:00falsefalseForeign currency contracts [Member]us-gaap_DerivativeInstrumentsGainLossByDerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignExchangeContractMemberus-gaap_DerivativeInstrumentsGainLossByDerivativeInstrumentRiskAxisexplicitMemberfalsefalseInterest and other income, net [Member]us-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxisxbrldihttp://xbrl.org/2006/xbrldiamgn_InterestAndOtherIncomeMemberus-gaap_DerivativeInstrumentsGainLossByIncomeStatementLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2true0amgn_CondensedConsolidatedStatementsOfIncomeAndAmountOfGainRecognizedInIncomeForDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAbstractamgnfalsenadurationCondensed Consolidated Statements of Income and the amount of gain recognized in income for the derivative instruments not...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringCondensed Consolidated Statements of Income and the amount of gain recognized in income for the derivative instruments not designated as hedging instruments.falsefalse3false0us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse-51000000-51falsetruefalsefalsefalse2truefalsefalse2300000023falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44
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