Equity - Summary of Changes in Equity (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Beginning balance	$ 8,454	$ 9,829	$ 8,389	$ 10,311
Net income (loss)	261	103	308	(108)
Other comprehensive income	308	186	421	(2)
Dividends	(1)		(80)	(81)
Other	52	9	36	(2)
Ending balance	$ 9,074	10,127	$ 9,074	10,127
Cumulative Effect, Period of Adoption, Adjustment
Class of Stock [Line Items]
Beginning balance				9
Class A Common Stock
Class of Stock [Line Items]
Beginning balance, shares			388,922,752
Ending balance, shares	391,082,746		391,082,746
Class B Common Stock
Class of Stock [Line Items]
Beginning balance, shares			199,630,240
Ending balance, shares	199,630,240		199,630,240
Common Stock | Class A Common Stock
Class of Stock [Line Items]
Beginning balance	$ 4	$ 4	$ 4	$ 4
Beginning balance, shares	391,000,000	388,000,000	389,000,000	386,000,000
Other, Shares	0	1,000,000	2,000,000	3,000,000
Ending balance	$ 4	$ 4	$ 4	$ 4
Ending balance, shares	391,000,000	389,000,000	391,000,000	389,000,000
Common Stock | Class B Common Stock
Class of Stock [Line Items]
Beginning balance	$ 2	$ 2	$ 2	$ 2
Beginning balance, shares	200,000,000	200,000,000	200,000,000	200,000,000
Ending balance	$ 2	$ 2	$ 2	$ 2
Ending balance, shares	200,000,000	200,000,000	200,000,000	200,000,000
Additional Paid-in Capital
Class of Stock [Line Items]
Beginning balance	$ 12,075	$ 12,174	$ 12,148	$ 12,243
Dividends	0		(59)	(59)
Other	16	9	2	(1)
Ending balance	12,091	12,183	12,091	12,183
Accumulated Deficit
Class of Stock [Line Items]
Beginning balance	(3,207)	(2,200)	(3,241)	(1,979)
Net income (loss)	231	85	265	(142)
Other		1		1
Ending balance	(2,976)	(2,114)	(2,976)	(2,114)
Accumulated Deficit | Cumulative Effect, Period of Adoption, Adjustment
Class of Stock [Line Items]
Beginning balance				6
Accumulated Other Comprehensive Loss
Class of Stock [Line Items]
Beginning balance	(1,235)	(1,266)	(1,331)	(1,126)
Other comprehensive income	245	150	341	7
Other		(1)		(1)
Ending balance	(990)	(1,117)	(990)	(1,117)
Accumulated Other Comprehensive Loss | Cumulative Effect, Period of Adoption, Adjustment
Class of Stock [Line Items]
Beginning balance				3
Total News Corp Equity
Class of Stock [Line Items]
Beginning balance	7,639	8,714	7,582	9,144
Net income (loss)	231	85	265	(142)
Other comprehensive income	245	150	341	7
Dividends	0		(59)	(59)
Other	16	9	2	(1)
Ending balance	8,131	8,958	8,131	8,958
Total News Corp Equity | Cumulative Effect, Period of Adoption, Adjustment
Class of Stock [Line Items]
Beginning balance				9
Non-controlling Interests
Class of Stock [Line Items]
Beginning balance	815	1,115	807	1,167
Net income (loss)	30	18	43	34
Other comprehensive income	63	36	80	(9)
Dividends	(1)		(21)	(22)
Other	36	0	34	(1)
Ending balance	$ 943	$ 1,169	$ 943	$ 1,169