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Subsequent events	9 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent events	Subsequent event On October 19, 2021, Amgen completed its acquisition of Teneobio, Inc. (Teneobio), a privately held, clinical-stage biotechnology company developing a new class of biologics called heavy-chain only antibodies (HCAbs). Amgen acquired all outstanding shares in exchange for a $900 million upfront payment, as well as future contingent milestone payments potentially worth up to an additional $1.6 billion in cash upon the achievement of certain development and regulatory events. The accounting impact of this acquisition and the results of operations for Teneobio will be included in our consolidated financial statements beginning in the fourth quarter of 2021. The initial accounting for this acquisition is incomplete, pending identification and measurement of the assets acquired and liabilities assumed.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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