Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended																12 Months Ended
		Jun. 30, 2020		Mar. 31, 2020		Dec. 31, 2019		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Selected Quarterly Financial Information [Abstract]
Revenues		$ 2,418		$ 3,440		$ 3,778		$ 2,667		$ 2,513		$ 2,752		$ 3,583		$ 2,541		$ 12,303	$ 11,389	$ 10,153
Net income attributable to Fox Corporation stockholders		$ 122	[1]	$ 78	[1]	$ 300	[1]	$ 499	[1]	$ 454	[1]	$ 529	[1]	$ 8	[1]	$ 604	[1]	$ 999	$ 1,595	$ 2,187
Net income attributable to Fox Corporation stockholders per share - basic		$ 0.20		$ 0.13		$ 0.49		$ 0.80										$ 1.63	$ 2.57	$ 3.52
Net income attributable to Fox Corporation stockholders per share - diluted		0.20		0.13		0.48		0.80										1.62	2.57	$ 3.52
Net income attributable to Fox Corporation stockholders per share - basic and diluted	[2]									$ 0.73		$ 0.85		$ 0.01		$ 0.97
Class A Common Stock | Maximum
Selected Quarterly Financial Information [Abstract]
Stock Prices	[3]	32.48		39.34		37.57		37.82		39.40		41.70		0		0		32.48	39.40
Class A Common Stock | Minimum
Selected Quarterly Financial Information [Abstract]
Stock Prices	[3]	22.30		20.20		30.06		31.44		34.01		36.40		0		0		22.30	34.01
Class B Common Stock | Maximum
Selected Quarterly Financial Information [Abstract]
Stock Prices	[3]	31.68		38.58		36.80		37.85		38.74		41.02		0		0		31.68	38.74
Class B Common Stock | Minimum
Selected Quarterly Financial Information [Abstract]
Stock Prices	[3]	$ 21.57		$ 19.81		$ 30.04		$ 31.44		$ 33.68		$ 35.67		$ 0		$ 0		$ 21.57	$ 33.68

[1] See Note 5—Inventories, net and Note 21—Additional Financial Information under the heading “Other, net” for details of infrequent items recorded during the fiscal year. In addition, the Company recorded impairment and restructuring charges of $442 million, or $0.73 per basic and diluted share, during the fourth quarter of fiscal 2020 (See Note 4—Restructuring Programs for additional information).

[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.