Investments - Schedule of Equity Losses of Affiliates (Parenthetical) (Detail) - USD ($) $ in Millions				3 Months Ended			9 Months Ended
		Jun. 30, 2013	Nov. 30, 2012	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2018	Mar. 31, 2017
Schedule of Equity Method Investments [Line Items]
Non-cash write-downs of equity method investment							$ 13
Foxtel [Member]
Schedule of Equity Method 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%
Fair value control premium								10.00%
Equity method investment ownership percentage	[1]			50.00%			50.00%
Foxtel [Member] | Equity Losses of Affiliates [Member]
Schedule of Equity Method Investments [Line Items]
Amortization of excess basis allocated to finite-lived intangible assets				$ 17	$ 16		$ 49	$ 53
Foxtel [Member] | Consolidated Media Holdings Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Business acquisition date			Nov. 30, 2012
Equity method investment ownership percentage			25.00%
Fox Sports [Member] | Consolidated Media Holdings Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment ownership percentage			50.00%
Business acquisition recognized gain resulting from remeasurement of previously held equity interest		$ 1,300
Ownership percentage			25.00%
Fox Sports Foxtel CMH [Member]
Schedule of Equity Method Investments [Line Items]
Business acquisition recognized gain resulting from remeasurement of previously held equity interest		$ 900

[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%.