Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended																12 Months Ended
	Jun. 30, 2021		Mar. 31, 2021		Dec. 31, 2020		Sep. 30, 2020		Jun. 30, 2020		Mar. 31, 2020		Dec. 31, 2019		Sep. 30, 2019		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Selected Quarterly Financial Information [Abstract]
Revenues	$ 2,890		$ 3,215		$ 4,087		$ 2,717		$ 2,418		$ 3,440		$ 3,778		$ 2,667		$ 12,909	$ 12,303	$ 11,389
Net income attributable to Fox Corporation stockholders	$ 253	[1]	$ 567	[1]	$ 224	[1]	$ 1,106	[1]	$ 122	[1]	$ 78	[1]	$ 300	[1]	$ 499	[1]	$ 2,150	$ 999	$ 1,595
Basic	$ 0.44		$ 0.96		$ 0.38		$ 1.83		$ 0.20		$ 0.13		$ 0.49		$ 0.80		$ 3.64	$ 1.63	$ 2.57
Diluted	$ 0.43		$ 0.96		$ 0.37		$ 1.83		$ 0.20		$ 0.13		$ 0.48		$ 0.80		$ 3.61	$ 1.62	$ 2.57

[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).