Investments - Schedule of Investments (Parenthetical) (Detail) $ in Millions, $ in Millions				3 Months Ended				9 Months Ended
		Sep. 28, 2017 USD ($)	Sep. 28, 2017 AUD ($)	Mar. 31, 2018 USD ($)		Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2018 USD ($)		Mar. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	[1]	Jun. 30, 2017 AUD ($)
Foxtel [Member]
Schedule of Investments [Line Items]
Write down of investment				$ 957			$ 227	$ 957		$ 227
Discount rates				10.25%						9.00%
Long-term growth rates				2.00%						2.50%
Loan receivable from Foxtel				$ 0	[1]			0	[1]		$ 370		$ 481
Equity method investment additional capital contribution		$ 388	$ 494
SEEK Asia Limited [Member]
Schedule of Investments [Line Items]
Proceeds from sale of investment				122
Gain on sale of investment	[2]			$ 32		$ 0		$ 32		$ 0

[1] During the three months ended March 31, 2018, the Company recognized a $957 million non-cash write-down of the carrying value of its investment in Foxtel. In the third quarter of fiscal 2018, as part of the long range planning process and in preparation for the Transaction, the Company assessed the long-term prospects for Foxtel, on both a stand-alone and combined basis. As a result of lower-than-expected revenues from certain new products and broadcast subscribers at Foxtel, the Company revised its outlook for Foxtel, which resulted in a reduction in expected future cash flows. Based on the revised projections, the Company concluded that the fair value of its investment in Foxtel declined below its carrying value. The assumptions utilized in the income approach valuation method were a discount rate of 10.25% and a long-term growth rate of 2.0%.

[2] During the three months ended March 31, 2018, the Company sold its investment in SEEKAsia for $122 million in cash and recognized a $32 million gain in Other, net.