v3.26.1
Non-financial assets and liabilities - Additional Information, Intangibles (Details)
 12 Months Ended
Mar. 31, 2026
USD ($)
Jun. 30, 2026
USD ($)
acquisition
segment
Jun. 30, 2025
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2013
USD ($)
Jun. 30, 2010
USD ($)
Disclosure Of Intangible Assets [Line Items]              
Number of acquisitions | acquisition   2          
Number of reportable operating segment | segment   1          
In process research and development recognized   $ 325,100,000 $ 325,100,000        
Reclassifications     0        
Angioblast Systems Inc in 2010              
Disclosure Of Intangible Assets [Line Items]              
Goodwill             $ 118,400,000
In process research and development recognized             $ 387,000,000.0
Osiris MSC in 2013              
Disclosure Of Intangible Assets [Line Items]              
Goodwill           $ 13,900,000  
In process research and development recognized           $ 126,700,000  
Osiris MSC in 2015              
Disclosure Of Intangible Assets [Line Items]              
Goodwill         $ 2,100,000    
TEMCELL Asset | Japan              
Disclosure Of Intangible Assets [Line Items]              
In process research and development recognized         $ 24,000,000.0    
MPC-MICRO-IO and MPC-CBE              
Disclosure Of Intangible Assets [Line Items]              
In process research and development recognized       $ 61,900,000      
Goodwill              
Disclosure Of Intangible Assets [Line Items]              
Impairment loss recognised in profit or loss $ 0 0          
In-process research and development acquired              
Disclosure Of Intangible Assets [Line Items]              
Impairment loss recognised in profit or loss $ 0 0          
Reclassifications   $ (102,700,000) $ (102,698,000)        
Bottom of range | Discounted cash flow              
Disclosure Of Intangible Assets [Line Items]              
Real post-tax discount rate   12.50%          
Expected patent expiry   6 years          
Top of range | Discounted cash flow              
Disclosure Of Intangible Assets [Line Items]              
Real post-tax discount rate   14.50%          
Expected patent expiry   22 years          
Licenses to patents | Bottom of range              
Disclosure Of Intangible Assets [Line Items]              
Useful life measured as period of time, intangible assets other than goodwill   7 years          
Licenses to patents | Top of range              
Disclosure Of Intangible Assets [Line Items]              
Useful life measured as period of time, intangible assets other than goodwill   18 years          
Current marketed products | Bottom of range              
Disclosure Of Intangible Assets [Line Items]              
Useful life measured as period of time, intangible assets other than goodwill   16 years          
Current marketed products | Top of range              
Disclosure Of Intangible Assets [Line Items]              
Useful life measured as period of time, intangible assets other than goodwill   22 years