Segment Information (Reconciliation of Revenues and Segment EBITDA from Segments to Consolidated) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenues		$ 3,215	$ 3,440	$ 10,019	$ 9,885
Amortization of cable distribution investments		(6)	(5)	(17)	(19)
Depreciation and amortization		(78)	(57)	(216)	(164)
Impairment and restructuring charges		0	0	(35)	(9)
Interest expense		(98)	(89)	(296)	(269)
Interest income		0	8	3	33
Other, net		61	(632)	752	(345)
Income before income tax expense		778	145	2,561	1,264
Income tax expense		(196)	(55)	(632)	(347)
Net income		582	90	1,929	917
Less: Net income attributable to noncontrolling interests	[1]	(15)	(12)	(32)	(40)
Net income attributable to Fox Corporation stockholders		567	78	1,897	877
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Revenues		1,471	1,467	4,284	4,221
Segment EBITDA		850	792	2,202	2,032
Depreciation and amortization		(16)	(15)	(41)	(44)
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Revenues		1,695	1,926	5,601	5,548
Segment EBITDA		135	224	407	261
Depreciation and amortization		(26)	(17)	(77)	(46)
Operating Segments | Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Revenues		49	47	134	116
Segment EBITDA		(86)	(96)	(239)	(256)
Depreciation and amortization		$ (36)	$ (25)	$ (98)	$ (74)

[1] Net income attributable to noncontrolling interests includes $5 million and $4 million for the three months ended March 31, 2021 and 2020, respectively, and $13 million and $16 million for the nine months ended March 31, 2021 and 2020, respectively, relating to redeemable noncontrolling interests.