Segment Information (Reconciliation of Revenues and Segment EBITDA from Segments to Consolidated) (Details) - USD ($) $ 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
Segment Reporting Information [Line Items]
Revenues		$ 2,418		$ 3,440		$ 3,778		$ 2,667		$ 2,513		$ 2,752		$ 3,583		$ 2,541		$ 12,303	$ 11,389	$ 10,153
Amortization of cable distribution investments																		(24)	(38)	(53)
Depreciation and amortization																		(258)	(212)	(171)
Impairment and restructuring charges		(442)																(451)	(26)	(16)
Interest expense																		(369)	(203)	(43)
Interest income																		35	41	0
Other, net																		(248)	(19)	(39)
Income before income tax (expense) benefit																		1,464	2,224	2,170
Income tax (expense) benefit																		(402)	(581)	58
Net income																		1,062	1,643	2,228
Less: Net income attributable to noncontrolling interests	[1]																	(63)	(48)	(41)
Net income attributable to Fox Corporation stockholders		$ 122	[2]	$ 78	[2]	$ 300	[2]	$ 499	[2]	$ 454	[2]	$ 529	[2]	$ 8	[2]	$ 604	[2]	999	1,595	2,187
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Revenues																		5,492	5,381	5,049
Segment EBITDA																		2,706	2,495	2,308
Depreciation and amortization																		(59)	(48)	(38)
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Revenues																		6,661	5,979	5,106
Segment EBITDA																		430	470	379
Depreciation and amortization																		(73)	(96)	(112)
Operating Segments | Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Revenues																		150	29	(2)
Segment EBITDA																		(357)	(284)	(195)
Depreciation and amortization																		$ (126)	$ (68)	$ (21)

[1] Net income attributable to noncontrolling interests includes $33 million, $33 million and $41 million for the fiscal years ended June 30, 2020, 2019 and 2018, 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).