Segment Information - Reconciliation of Revenues and Segment EBITDA from Segments to Consolidated (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended		9 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenues		$ 4,441	$ 4,087	$ 7,486	$ 6,804
Amortization of cable distribution investments		(4)	(6)	(9)	(11)
Depreciation and amortization		(93)	(70)	(172)	(138)	$ (172)	$ (138)
Impairment and restructuring charges		0	0	0	(35)
Interest expense, net		(97)	(97)	(194)	(195)
Other, net		(211)	172	(142)	691
(Loss) income before income tax benefit (expense)		(95)	304	857	1,783
Income tax benefit (expense)		22	(74)	(222)	(436)
Net (loss) income		(73)	230	635	1,347
Less: Net income attributable to noncontrolling interests	[1]	(12)	(6)	(19)	(17)
Net (loss) income attributable to Fox Corporation stockholders		(85)	224	616	1,330
Operating Segments | Cable Network Programming
Segment Reporting Information [Line Items]
Revenues		1,638	1,488	3,054	2,813
Segment EBITDA		668	571	1,442	1,352
Depreciation and amortization		(17)	(12)	(27)	(25)	(27)	(25)
Operating Segments | Television
Segment Reporting Information [Line Items]
Revenues		2,759	2,556	4,340	3,906
Segment EBITDA		(273)	(185)	86	272
Depreciation and amortization		(28)	(26)	(54)	(51)	(54)	(51)
Operating Segments | Other, Corporate and Eliminations
Segment Reporting Information [Line Items]
Revenues		44	43	92	85
Segment EBITDA		(85)	(81)	(154)	(153)
Depreciation and amortization		$ (48)	$ (32)	$ (91)	$ (62)	$ (91)	$ (62)

[1] Net income attributable to noncontrolling interests includes $(3) million and $4 million for the three months ended December 31, 2021 and 2020, respectively, and $(4) million and $8 million for the six months ended December 31, 2021 and 2020, respectively, relating to redeemable noncontrolling interests.