v3.26.1
Shareholders' Equity - Changes in Ordinary and Treasury Shares (Details) - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Beginning Balance $ 11,740.0 $ 3,953.0 $ 4,090.0  
Share buyback/cancellations (1.0)   (30.0)  
Purchase of treasury shares (29.0) (47.0) (48.0)  
Acquisition of Berry Global Group, Inc.   8,212.0    
Ending Balance $ 11,801.0 $ 11,740.0 $ 3,953.0  
Treasury shares (in shares) 0.4 0.1    
Ordinary Shares        
Beginning Balance (in shares) 461.1 289.0 289.7  
Beginning Balance $ 23.0 $ 14.0 $ 14.0  
Share buy-back/cancellations (in shares)     (0.7)  
Share buyback/cancellations $ 0.0   $ 0.0  
Issuance of shares (in shares) 1.3 172.1    
Acquisition of Berry Global Group, Inc. $ 0.0 $ 9.0    
Ending Balance (in shares) 462.3 461.1 289.0  
Ending Balance $ 23.0 $ 23.0 $ 14.0  
Treasury Shares        
Beginning Balance $ (6.0) $ (11.0) $ (12.0)  
Options exercised and shares vested (in shares) (1.5) (0.9) (0.8)  
Options exercised and shares vested, and related tax withholdings $ 75.0 $ 52.0 $ 49.0  
Purchase of treasury shares (in shares) 0.5 0.8 0.8  
Purchase of treasury shares $ (29.0) $ (47.0) $ (48.0)  
Issuance of shares (in shares) 1.3      
Acquisition of Berry Global Group, Inc. $ (56.0)      
Ending Balance $ (16.0) $ (6.0) $ (11.0)  
Treasury shares (in shares) 0.4 0.1 0.2 0.2