Contingencies (Details) R$ in Millions, $ in Millions			1 Months Ended					145 Months Ended
	Mar. 31, 2021 BRL (R$) lawsuit request claimant patent site	Mar. 31, 2021 USD ($) lawsuit request claimant patent site	Mar. 31, 2020 patent	Feb. 29, 2020 patent	Dec. 31, 2019	Jul. 31, 2019 BRL (R$)	Jul. 31, 2018 BRL (R$)	Mar. 31, 2021 request lawsuit claimant plaintiff patent site	Nov. 30, 2017 lawsuit	Jan. 31, 2013 lawsuit	Jul. 31, 2012 lawsuit	Dec. 31, 2011 lawsuit
Loss Contingencies [Line Items]
Number of requests for information | request	2	2						2
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								810
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	3	3						3
Number of plaintiffs | plaintiff								4
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
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	9	9		9				9
Number of patents, claims dismissed | patent				6
Number of patents ruled unpatentable | patent			3
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	$ 165				R$ 500	R$ 300