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Contingencies and commitments (Sandoz Patent Litigation) (Details) | 1 Months Ended
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Jun. 30, 2018 lawsuit
Sandoz Inc. |
Gain Contingencies [Line Items] |
Number of lawsuits filed | 19

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- Definition Gain Contingency, Number of Lawsuits Filed + References No definition available. + Details
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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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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