Additional Financial Information - Components of Other, Net (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Other Income and Expenses [Line Items]
Remeasurement of equity securities	$ 6	$ 30	$ (23)	$ 13
Gain on sale of SEEKAsia		32
Total Other, net	3	30	30	9
Nonoperating Income (Expense) [Member]
Other Income and Expenses [Line Items]
Dividends received from equity security investments	1	0	24	0
Remeasurement of equity securities	6	0	(23)	0
Write-down of available-for-sale securities	0	(3)	0	(33)
Gain on sale of Australian property	2	0	14	0
Gain on sale of SEEKAsia	0	32	0	32
Other, net	(6)	1	15	10
Total Other, net	$ 3	$ 30	$ 30	$ 9