Retirement Benefit Obligations - Schedule of Accumulated and Projected Benefit Obligations and Fair Value of Plan Assets for Funded and Unfunded Pension Plans (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 1,549	$ 1,513	$ 1,484
Fair value of plan assets	1,447	1,319	1,325
Domestic Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	339	353	350
Accumulated benefit obligation	339	353
Fair value of plan assets	285	258	263
Domestic Pension Benefits | Funded Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	330	343
Accumulated benefit obligation	330	343
Fair value of plan assets	285	258
Domestic Pension Benefits | Unfunded Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	9	10
Accumulated benefit obligation	9	10
Fair value of plan assets	0	0
Foreign Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	1,124	1,051	1,025
Accumulated benefit obligation	1,118	1,044
Fair value of plan assets	1,162	1,061	$ 1,062
Foreign Pension Benefits | Funded Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	1,043	978
Accumulated benefit obligation	1,037	971
Fair value of plan assets	1,162	1,061
Foreign Pension Benefits | Unfunded Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	81	73
Accumulated benefit obligation	81	73
Fair value of plan assets	$ 0	$ 0