Retirement Benefit Obligations - Schedule of Components of Net Periodic Costs (Income) (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period	$ 2	$ 2	$ 2
Interest costs on projected benefit obligations	25	34	42
Expected return on plan assets	(50)	(59)	(61)
Amortization of deferred losses	20	16	14
Amortization of prior service credits	(4)	(3)	(3)
Settlements, curtailments and other	6	17	4
Net periodic benefit (income) costs – Total	(1)	7	(2)
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period	0	0	0
Interest costs on projected benefit obligations	2	3	4
Expected return on plan assets	0	0	0
Amortization of deferred losses	0	0	0
Amortization of prior service credits	(4)	(3)	(3)
Settlements, curtailments and other	0	0	0
Net periodic benefit (income) costs – Total	(2)	0	1
Domestic Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period	0	0	0
Interest costs on projected benefit obligations	7	11	13
Expected return on plan assets	(13)	(16)	(15)
Amortization of deferred losses	5	5	4
Amortization of prior service credits	0	0	0
Settlements, curtailments and other	5	12	0
Net periodic benefit (income) costs – Total	4	12	2
Foreign Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period	2	2	2
Interest costs on projected benefit obligations	16	20	25
Expected return on plan assets	(37)	(43)	(46)
Amortization of deferred losses	15	11	10
Amortization of prior service credits	0	0	0
Settlements, curtailments and other	1	5	4
Net periodic benefit (income) costs – Total	$ (3)	$ (5)	$ (5)