Retirement Benefit Obligations - Schedule of Accumulated Benefit Obligation Exceeds Fair Value of Plan Assets (Detail) - Foreign Pension Benefits - USD ($) $ in Millions	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 332	$ 323
Accumulated benefit obligation	332	323
Fair value of plan assets	249	244
Funded Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	259	253
Accumulated benefit obligation	259	253
Fair value of plan assets	249	244
Unfunded Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	73	70
Accumulated benefit obligation	73	70
Fair value of plan assets	$ 0	$ 0

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Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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-Section 50
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Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets.

+ References

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Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.

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