v3.25.2
Commitments and Contingent Liabilities (Details)
¥ in Millions
12 Months Ended
Jan. 28, 2021
filer
Mar. 31, 2021
filer
Mar. 31, 2025
JPY (¥)
Mar. 31, 2024
JPY (¥)
lawsuit
Dec. 31, 2013
lawsuit
pharmacy
Disclosure of contingent liabilities [line items]          
Contractual commitments for acquisition of property, plant and equipment | ¥     ¥ 20,073    
Contractual commitments for acquisition of intangible assets | ¥     1,074,308    
Aggregate provisions for legal and other disputes | ¥     ¥ 12,462 ¥ 22,342  
ACTOS | U.S.          
Disclosure of contingent liabilities [line items]          
Number of lawsuits | lawsuit       6,100  
ACTOS | Outside the U.S.          
Disclosure of contingent liabilities [line items]          
Number of lawsuits | lawsuit       1  
TRINTELLIX          
Disclosure of contingent liabilities [line items]          
Notices received, number of filers | filer   16      
Lawsuits resolved before trial, number of filers | filer   10      
Trial, number of filers | filer 6        
ACTOS Antitrust Litigation          
Disclosure of contingent liabilities [line items]          
Number of lawsuits | lawsuit         2
DEXILANT Antitrust Litigation          
Disclosure of contingent liabilities [line items]          
Number of individual retail pharmacies | pharmacy         4