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Contingencies (Details)
R$ in Millions, $ in Millions
1 Months Ended 142 Months Ended
Dec. 31, 2020
BRL (R$)
lawsuit
claimant
patent
request
Dec. 31, 2020
USD ($)
lawsuit
claimant
patent
request
Mar. 31, 2020
patent
Feb. 29, 2020
patent
Dec. 31, 2019
Jul. 31, 2019
BRL (R$)
Jul. 31, 2018
BRL (R$)
Dec. 31, 2020
plaintiff
lawsuit
patent
request
claimant
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        
Actos | Product Liability                        
Loss Contingencies [Line Items]                        
Number of lawsuits 4 4           4        
Byetta | Product Liability                        
Loss Contingencies [Line Items]                        
Number of 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 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 lawsuits 55 55           55        
Number of plaintiffs | plaintiff               285        
Byetta | Southern District of California | Product Liability                        
Loss Contingencies [Line Items]                        
Number of lawsuits 515 515           515        
Number of plaintiffs | plaintiff               515        
Byetta | Various State Domiciles | Product Liability                        
Loss Contingencies [Line Items]                        
Number of lawsuits 3 3           3        
Number of plaintiffs | plaintiff               4        
Cialis® | Product Liability                        
Loss Contingencies [Line Items]                        
Number of lawsuits 350 350           350        
Jardiance | Product Liability                        
Loss Contingencies [Line Items]                        
Number of lawsuits 95 95           95        
Humalog, Humulin and Forteo                        
Loss Contingencies [Line Items]                        
Number of lawsuits 2 2           2        
Dr Reddy's Lab                        
Loss Contingencies [Line Items]                        
Claims settled and dismissed, 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 lawsuits                       1
Weiler v. Takeda Canada Inc. et al. | Actos | Product Liability                        
Loss Contingencies [Line Items]                        
Number of lawsuits                     1  
Weiler v. Takeda Canada Inc. et al. | Actos | Product Liability                        
Loss Contingencies [Line Items]                        
Number of lawsuits                 1      
Epp v. Takeda Canada Inc. et al. | Actos | Product Liability                        
Loss Contingencies [Line Items]                        
Number of lawsuits                   1    
Brazil | Employee Litigation                        
Loss Contingencies [Line Items]                        
Number of lawsuits 30 30           30        
Damages awarded, value R$ 950 $ 180       R$ 500 R$ 300