Additional Financial Information - Components of Other, Net Included in Statement of Operations (Detail) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
		Mar. 31, 2018	Sep. 30, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Other Income and Expenses [Line Items]
Remeasurement of equity securities				$ (23)	$ 35
Gain on sale of SEEKAsia		$ 32
Total Other, net				33	(324)	$ 135
REA Group [Member]
Other Income and Expenses [Line Items]
Gain on sale of REA Group's European business						107
Nonoperating Income (Expense) [Member]
Other Income and Expenses [Line Items]
Dividends received from equity security investments				24	0	0
Remeasurement of equity securities	[1]			(23)	0	0
Loss on the Transaction	[2]			0	(337)	0
Impairment of marketable securities and cost method investments	[3]		$ (33)	0		(21)
Gain on sale of Australian property				16	0	0
Gain on sale of SEEKAsia	[4]			0	32	0
Other	[5]			16	14	49
Total Other, net				33	(324)	135
Nonoperating Income (Expense) [Member] | REA Group [Member]
Other Income and Expenses [Line Items]
Gain on sale of REA Group's European business	[6]			$ 0	$ 0	$ 107

[1] As a result of the adoption of ASU 2016-01 during the first quarter of fiscal 2019, the Company has included the impact from the remeasurement of equity securities in Other, net in the Statement of Operations for the fiscal year ended June 30, 2019. During the fiscal year ended June 30, 2018, the impact from the remeasurement of equity securities was included in Accumulated other comprehensive loss in the Balance Sheets.

[2] See Note 4 —Acquisitions, Disposals and Other Transactions.

[3] For the fiscal year ended June 30, 2018 and 2017, the write-downs of available-for-sale securities were reclassified out of Accumulated other comprehensive loss and included in Other, net in the Statements of Operations. See Note 6 —Investment.

[4] During the third quarter of fiscal 2018, the Company sold its investment in SEEKAsia for $122 million in cash and recognized a $32 million gain in Other, net in the Statements of Operations.

[5] As a result of the adoption of ASU 2017-07 during the first quarter of fiscal 2019, the Company has included the other non-service cost components of net periodic benefit (income) cost in Other, net in the Statements of Operations for the fiscal years ended June 30, 2019, 2018 and 2017.

[6] The Company recognized a pre-tax gain of $107 million for the fiscal year ended June 30, 2017 related to REA Group’s sale of its European business. See Note 4 —Acquisitions, Disposals and Other Transactions.