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, 2022	Jun. 30, 2021
Disclosure Of Employee Benefits Restructuring And Post Retirement Employee Benefits Provisions [line items]
Defined Benefit Obligation at Present Value	$ 165	$ 377
Recognised Assets Defined Benefit Plan	(169)	(398)
Unfunded Defined Pension And Post Retirement Medical Benefits	85	321
UnFunded Postemployment Benefit Obligations	$ 200	$ 234

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, 2022

Jun. 30, 2021

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

Defined Benefit Obligation at Present Value

$ 165

$ 377

Recognised Assets Defined Benefit Plan

(169)

(398)

Unfunded Defined Pension And Post Retirement Medical Benefits

321

UnFunded Postemployment Benefit Obligations

$ 200

$ 234