Contingencies (Details) R$ in Millions, $ in Millions			1 Months Ended								151 Months Ended
	Sep. 30, 2021 BRL (R$) claimant lawsuit site	Sep. 30, 2021 USD ($) claimant lawsuit site	Aug. 31, 2021 patent decision	Jul. 31, 2021 claim	Jun. 30, 2021 BRL (R$) patent	Mar. 31, 2020 patent	Feb. 29, 2020 patent	Dec. 31, 2019	Jul. 31, 2019 BRL (R$)	Jul. 31, 2018 BRL (R$)	Sep. 30, 2021 lawsuit plaintiff site claimant	Sep. 30, 2018 patent	Nov. 30, 2017 lawsuit	Jan. 31, 2013 lawsuit	Jul. 31, 2012 lawsuit	Dec. 31, 2011 lawsuit
Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Number of sites jointly and severally liable for cleanup (fewer than) | site	10	10									10
Actos | Product Liability
Loss Contingencies [Line Items]
Number of pending lawsuits	4	4									4
Byetta | Product Liability
Loss Contingencies [Line Items]
Number of pending lawsuits	570	570									570
Number of plaintiffs | plaintiff											805
Number of claimants | claimant	20	20									20
Byetta | Pancreatic Cancer or Thyroid Cancer | Product Liability
Loss Contingencies [Line Items]
Number of pending lawsuits	565	565									565
Number of plaintiffs | plaintiff											800
Byetta | Pancreatitis | Product Liability
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff											6
Byetta | Ampullary Cancer | Product Liability
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff											1
Byetta | Los Angeles | Product Liability
Loss Contingencies [Line Items]
Number of pending lawsuits	55	55									55
Number of plaintiffs | plaintiff											285
Byetta | Southern District of California | Product Liability
Loss Contingencies [Line Items]
Number of pending lawsuits	515	515									515
Number of plaintiffs | plaintiff											515
Byetta | Various State Domiciles | Product Liability
Loss Contingencies [Line Items]
Number of pending lawsuits	2	2									2
Number of plaintiffs | plaintiff											2
Cialis® | Product Liability
Loss Contingencies [Line Items]
Number of pending lawsuits	350	350									350
Jardiance | Product Liability
Loss Contingencies [Line Items]
Number of pending lawsuits	95	95									95
Humalog, Humulin and Forteo
Loss Contingencies [Line Items]
Number of pending lawsuits	2	2									2
Insulin
Loss Contingencies [Line Items]
Number of claims dismissed | claim				3
Dr Reddy's Lab
Loss Contingencies [Line Items]
Limited initial market entry, supply term								21 days
Emgality Patent Litigation
Loss Contingencies [Line Items]
Number of patents | patent					2		9					9
Number of patents, claims dismissed | patent			6				6
Number of patents ruled unpatentable | patent						3
Number of decisions affirmed | decision			9
Casseres et al. v. Takeda Pharmaceutical North America, Inc., et al. | Actos | Product Liability
Loss Contingencies [Line Items]
Number of pending lawsuits																1
Weiler v. Takeda Canada Inc. et al. | Actos | Product Liability
Loss Contingencies [Line Items]
Number of pending lawsuits															1
Weiler v. Takeda Canada Inc. et al. | Actos | Product Liability
Loss Contingencies [Line Items]
Number of pending lawsuits													1
Epp v. Takeda Canada Inc. et al. | Actos | Product Liability
Loss Contingencies [Line Items]
Number of pending lawsuits														1
Brazil | Employee Litigation
Loss Contingencies [Line Items]
Number of pending lawsuits	30	30									30
Damages awarded, value	R$ 950	$ 175			R$ 100				R$ 500	R$ 300