Debt Instrument, Redemption Period without Payment of Make Whole Amount

No definition available.

Name:	amgn_DebtInstrumentRedemptionPeriodwithoutPaymentofMakeWholeAmount
Namespace Prefix:	amgn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

MakeWholePayments

+ References

No definition available.

+ Details

Name:	amgn_MakeWholePayments
Namespace Prefix:	amgn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Financing arrangements (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 3,250	$ 1,000
Notes [Member]
Debt Instrument [Line Items]
Face amount	$ 5,000
Notes [Member] \| 4.563% notes due 2048 (4.563% 2048 Notes) [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage	4.563%
Effective interest rate	6.30%
Notes [Member] \| 4.663% notes due 2051 (4.663% 2051 Notes) [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage	4.663%
Effective interest rate	5.60%
Notes [Member] \| Interest Expense [Member]
Debt Instrument [Line Items]
MakeWholePayments	$ 50
Notes [Member] \| 1.90% notes due 2025 (1.90% 2025 Notes) [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage	1.90%
Notes [Member] \| 2.20% notes due 2027 (2.20% 2027 Notes) [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage	2.20%
Notes [Member] \| 2.45% notes due 2030 (2.45% 2030 Notes) [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage	2.45%
Notes [Member] \| 3.15% notes due 2040 (3.15% 2040 Notes) [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage	3.15%
Notes [Member] \| 3.375% notes due 2050 (3.375% 2050 Notes) [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage	3.375%
Notes [Member] \| 3.45% notes due 2020 (3.45% 2020 Notes) [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage	3.45%
Notes [Member] \| 4.10% notes due 2021 (4.10% 2021 Notes) [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage	4.10%
Notes [Member] \| 1.85% notes due 2021 (1.85% 2021 Notes) [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage	1.85%
Notes [Member] \| 3.875% notes due 2021 (3.875% 2021 Notes) [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage	3.875%
Repayments of Long-term Debt	$ 300
Notes [Member] \| 4.50% notes due 2020 (4.50% 2020 Notes) [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage	4.50%
Minimum [Member] \| Debt Securities Payable [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Period without Payment of Make Whole Amount	1 month
Maximum [Member] \| Debt Securities Payable [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Period without Payment of Make Whole Amount	6 months