v3.25.2
Employee Benefits, Restructuring and Post-retirement Employee Benefits Provisions - Summary of Reconciliation of Employee Benefits, Restructuring and Post-retirement Employee Benefits (Detail)
$ in Millions
 12 Months Ended
Jun. 30, 2025
USD ($)
Disclosure of employee benefits restructuring and post retirement employee benefits provisions [line items]  
At the beginning of the financial year $ 2,043
Charge/(credit) for the year:  
Underlying 1,842
Discounting 28
Yield on defined benefit scheme assets (11)
Exchange variations (6)
Released during the year (18)
Remeasurement losses taken to retained earnings 8
Utilisation (1,589)
Transfers and other movements 1
At the end of the financial year 2,298
Employee benefits [member]  
Disclosure of employee benefits restructuring and post retirement employee benefits provisions [line items]  
At the beginning of the financial year 1,698
Charge/(credit) for the year:  
Underlying 1,511
Exchange variations (11)
Released during the year (5)
Utilisation (1,314)
At the end of the financial year 1,879
Restructuring [member]  
Disclosure of employee benefits restructuring and post retirement employee benefits provisions [line items]  
At the beginning of the financial year 45
Charge/(credit) for the year:  
Underlying 275
Released during the year (13)
Utilisation (224)
At the end of the financial year 83
Post-retirement employee benefits [member]  
Disclosure of employee benefits restructuring and post retirement employee benefits provisions [line items]  
At the beginning of the financial year 300
Charge/(credit) for the year:  
Underlying 56
Discounting 28
Yield on defined benefit scheme assets (11)
Exchange variations 5
Remeasurement losses taken to retained earnings 8
Utilisation (51)
Transfers and other movements 1
At the end of the financial year $ 336