Segment Information (Reconciliation of Revenues and Segment EBITDA from Segments to Consolidated) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenues		$ 4,087	$ 3,778	$ 6,804	$ 6,445
Amortization of cable distribution investments		(6)	(5)	(11)	(14)
Depreciation and amortization		(70)	(57)	(138)	(107)
Impairment and restructuring charges		0	0	(35)	(9)
Interest expense		(99)	(90)	(198)	(180)
Interest income		2	8	3	25
Other, net		172	302	691	287
Income before income tax expense		304	419	1,783	1,119
Income tax expense		(74)	(105)	(436)	(292)
Net income		230	314	1,347	827
Less: Net income attributable to noncontrolling interests	[1]	(6)	(14)	(17)	(28)
Net income attributable to Fox Corporation stockholders		224	300	1,330	799
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Revenues		1,488	1,469	2,813	2,754
Segment EBITDA		571	556	1,352	1,240
Depreciation and amortization		(12)	(16)	(25)	(29)
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Revenues		2,556	2,266	3,906	3,622
Segment EBITDA		(185)	(214)	272	37
Depreciation and amortization		(26)	(14)	(51)	(29)
Operating Segments | Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Revenues		43	43	85	69
Segment EBITDA		(81)	(81)	(153)	(160)
Depreciation and amortization		$ (32)	$ (27)	$ (62)	$ (49)

[1] Net income attributable to noncontrolling interests includes $4 million and $3 million for the three months ended December 31, 2020 and 2019, respectively, and $8 million and $12 million for the six months ended December 31, 2020 and 2019, respectively, relating to redeemable noncontrolling interests.