Quarterly Data (Unaudited) (Parenthetical) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended					12 Months Ended
		Jun. 30, 2020	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]
Impairment and restructuring charges		$ 442					$ 451	$ 26	$ 16
Net income attributable to Fox Corporation stockholders per share - basic and diluted	[1]		$ 0.73	$ 0.85	$ 0.01	$ 0.97
Shares utilized for calculation of basic and diluted earnings per share								621	621
Impairment and Restructuring
Selected Quarterly Financial Information [Abstract]
Net income attributable to Fox Corporation stockholders per share - basic and diluted		$ 0.73

[1] 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).