Segment Information (Reconciliation of Revenues and Segment EBITDA from Segments to Consolidated) (Details) - USD ($) $ 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
Segment Reporting Information [Line Items]
Revenues		$ 2,890		$ 3,215		$ 4,087		$ 2,717		$ 2,418		$ 3,440		$ 3,778		$ 2,667		$ 12,909	$ 12,303	$ 11,389
Amortization of cable distribution investments																		(22)	(24)	(38)
Depreciation and amortization																		(300)	(258)	(212)
Impairment and restructuring charges										(442)								(35)	(451)	(26)
Interest expense																		(395)	(369)	(203)
Interest income																		4	35	41
Other, net																		579	(248)	(19)
Income before income tax expense																		2,918	1,464	2,224
Income tax expense																		(717)	(402)	(581)
Net income																		2,201	1,062	1,643
Less: Net income attributable to noncontrolling interests	[1]																	(51)	(63)	(48)
Net income attributable to Fox Corporation stockholders		$ 253	[2]	$ 567	[2]	$ 224	[2]	$ 1,106	[2]	$ 122	[2]	$ 78	[2]	$ 300	[2]	$ 499	[2]	2,150	999	1,595
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Revenues																		5,683	5,492	5,381
Segment EBITDA																		2,876	2,706	2,495
Depreciation and amortization																		(55)	(59)	(48)
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Revenues																		7,048	6,661	5,979
Segment EBITDA																		555	430	470
Depreciation and amortization																		(104)	(73)	(96)
Operating Segments | Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Revenues																		178	150	29
Segment EBITDA																		(344)	(357)	(284)
Depreciation and amortization																		$ (141)	$ (126)	$ (68)

[1] Net income attributable to noncontrolling interests includes $25 million, $33 million and $33 million for the fiscal years ended June 30, 2021, 2020 and 2019, respectively, relating to redeemable noncontrolling interests.

[2] 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).