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Contingencies and commitments (Sandoz ENBREL Patent Litigation) (Details) - ENBREL (etanercept) [Member] | Feb. 26, 2016 patent affiliate
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Gain Contingencies [Line Items] |
Gain contingency, number of affiliates | affiliate | 2
Number of patents allegedly infringed | patent | 5

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- Definition Gain Contingency, Number of Affiliates + References No definition available. + Details
Name: | amgn_GainContingencyNumberofAffiliates
Namespace Prefix: | amgn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_GainContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of entity's patents that another entity has allegedly infringed. + References No definition available. + Details
Name: | us-gaap_GainContingencyPatentsAllegedlyInfringedUponNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_LitigationCaseAxis=amgn_ENBRELetanerceptMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |