Income Taxes - Change in Unrecognized Tax Benefits, Excluding Interest and Penalties (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of period	$ 63	$ 58	$ 62
Additions for prior year tax positions	0	4	0
Additions for current year tax positions	4	8	4
Reduction for prior year tax positions	(2)	(1)	0
Lapse of the statute of limitations	(3)	(3)	(6)
Settlement—tax attributes	0	(2)	0
Impact of currency translations	7	(1)	(2)
Balance, end of period	$ 69	$ 63	$ 58