Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended																12 Months Ended
		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Selected Quarterly Financial Information [Abstract]
Revenues		$ 2,513		$ 2,752		$ 3,583		$ 2,541		$ 2,394		$ 2,463		$ 3,108		$ 2,188		$ 11,389	$ 10,153	$ 9,921
Net income attributable to Fox Corporation stockholders		$ 454	[1]	$ 529	[1]	$ 8	[1]	$ 604	[1]	$ 471	[1]	$ 457	[1]	$ 869	[1]	$ 390	[1]	$ 1,595	$ 2,187	$ 1,372
Net income attributable to Fox Corporation stockholders per share - basic and diluted		$ 0.73	[2]	$ 0.85	[2]	$ 0.01	[2]	$ 0.97	[2]	$ 0.76	[2]	$ 0.74	[2]	$ 1.40	[2]	$ 0.63	[2]	$ 2.57	$ 3.52	$ 2.21
Class A Common Stock | Maximum
Selected Quarterly Financial Information [Abstract]
Stock Prices	[3]	39.40		41.70		0		0										39.40
Class A Common Stock | Minimum
Selected Quarterly Financial Information [Abstract]
Stock Prices	[3]	34.01		36.40		0		0										34.01
Class B Common Stock | Maximum
Selected Quarterly Financial Information [Abstract]
Stock Prices	[3]	38.74		41.02		0		0										38.74
Class B Common Stock | Minimum
Selected Quarterly Financial Information [Abstract]
Stock Prices	[3]	$ 33.68		$ 35.67		$ 0		$ 0										$ 33.68

[1] See Note 5—Inventories, net and Note 20—Additional Financial Information under the heading “Other, net” for details of infrequent items recorded during the fiscal year. In addition, the Company recorded a provisional income tax benefit of $624 million, or $1.01 per basic and diluted share, during the second quarter of fiscal 2018 to reflect the impact of the Tax Act (See Note 2—Summary of Significant Accounting Policies under the heading “U.S. Tax Reform”).

[2] For all periods presented that ended prior to the date of the Distribution, 621 million shares have been utilized for the calculation of basic and diluted earnings per share as no shares of common stock or equity-based awards of the Company were outstanding prior to that date (See Note 2—Summary of Significant Accounting Policies under the heading “Earnings per share” for additional information).

[3] The stock prices reflect the reported high and low sales prices for the Class A Common Stock and Class B Common Stock, as reported on NASDAQ under the symbols “FOXA” and “FOX”, respectively, since March 13, 2019, the date that the Company’s Common Stock began "when-issued" trading.