Contingencies and commitments (Details) $ in Billions		1 Months Ended	3 Months Ended
	Apr. 17, 2023	Jun. 08, 2021 lawsuit	Apr. 30, 2019 claim lawsuit plaintiff	Dec. 31, 2024 USD ($) installment	Nov. 13, 2024 patent	Oct. 04, 2024 patent	Aug. 12, 2024 patent	May 28, 2024 patent	May 02, 2024 case	Apr. 11, 2024 case	Jan. 10, 2024 patent	Dec. 01, 2023 claim	Mar. 11, 2022 state
Loss Contingencies [Line Items]
U.S. repatriation tax commitments, number of annual installments | installment				8
Final U.S. repatriation tax payment | $				$ 1.8
Amgen Inc. et al. v. Celltrion Inc., et al | Pending Litigation
Loss Contingencies [Line Items]
Potential number of patents infringed upon								29
Amgen Inc. et al. v. Samsung Bioepis Co. Ltd., et al | Pending Litigation
Loss Contingencies [Line Items]
Potential number of patents infringed upon							34
Amgen Inc. et al. v. Fresenius Kabi USA, LLC et al | Pending Litigation
Loss Contingencies [Line Items]
Potential number of patents infringed upon						33
Amgen Inc. et al. v. Accord et al | Pending Litigation
Loss Contingencies [Line Items]
Potential number of patents infringed upon					34
Sensipar Antitrust Class Actions | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, number of plaintiffs | plaintiff			4
Number of lawsuits | claim			2
Loss contingency, number of lawsuits filed | lawsuit			4
Number of states in which plaintiffs reside | state													10
Class action complaint response period	30 days
PAVBLU Patent Litigation | Pending Litigation
Loss Contingencies [Line Items]
Potential number of patents infringed upon											32
Number of litigation cases | case										5
Martin Derivative Action | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, number of additional claims | claim												2
ChemoCentryx, Inc. Securities Matters
Loss Contingencies [Line Items]
Number of class action law suits | lawsuit		2
Number of securities cases | case									2