Segment Information (Reconciliation of Revenues and Segment EBITDA from Segments to Consolidated) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenues		$ 3,440	$ 2,752	$ 9,885	$ 8,876
Amortization of cable distribution investments		(5)	(10)	(19)	(29)
Depreciation and amortization		(57)	(58)	(164)	(152)
Impairment and restructuring charges		0	(14)	(9)	(14)
Interest expense		(89)	(81)	(269)	(112)
Interest income		8	19	33	19
Other, net		(632)	84	(345)	(116)
Income before income tax expense		145	706	1,264	1,568
Income tax expense		(55)	(167)	(347)	(390)
Net income		90	539	917	1,178
Less: Net income attributable to noncontrolling interests	[1]	(12)	(10)	(40)	(37)
Net income attributable to Fox Corporation stockholders		78	529	877	1,141
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Revenues		1,467	1,383	4,221	4,082
Segment EBITDA		792	741	2,032	1,893
Depreciation and amortization		(15)	(12)	(44)	(35)
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Revenues		1,926	1,370	5,548	4,796
Segment EBITDA		224	99	261	256
Depreciation and amortization		(17)	(28)	(46)	(80)
Operating Segments | Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Revenues		47	(1)	116	(2)
Segment EBITDA		(96)	(74)	(256)	(177)
Depreciation and amortization		$ (25)	$ (18)	$ (74)	$ (37)

[1] Net income attributable to noncontrolling interests includes $4 million and $6 million for the three months ended March 31, 2020 and 2019, respectively, and $16 million and $27 million for the nine months ended March 31, 2020 and 2019, respectively, relating to redeemable noncontrolling interests.