Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ 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
Earnings Per Share [Abstract]
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
Weighted average shares – basic and diluted	[2]																	621	621	621
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

[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).