Employee Benefits, Restructuring and Post-retirement Employee Benefits Provisions - Summary of Reconciliation of Employee Benefits, Restructuring and Post-retirement Employee Benefits (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2024	Jun. 30, 2023
Disclosure Of Employee Benefits Restructuring And Post Retirement Employee Benefits Provisions [line items]
Defined Benefit Obligation at Present Value	$ 142	$ 151
Recognised Assets Defined Benefit Plan	(147)	(159)
Unfunded Defined Pension And Post Retirement Medical Benefits	63	79
UnFunded Postemployment Benefit Obligations	$ 242	$ 302

Employee Benefits, Restructuring and Post-retirement Employee Benefits Provisions - Summary of Reconciliation of Employee Benefits, Restructuring and Post-retirement Employee Benefits (Parenthetical) (Detail) - USD ($)
$ in Millions

12 Months Ended

Jun. 30, 2024

Jun. 30, 2023

Disclosure Of Employee Benefits Restructuring And Post Retirement Employee Benefits Provisions [line items]

Defined Benefit Obligation at Present Value

$ 142

$ 151

Recognised Assets Defined Benefit Plan

(147)

(159)

Unfunded Defined Pension And Post Retirement Medical Benefits

UnFunded Postemployment Benefit Obligations

$ 242

$ 302