Equity - Summary of Changes in Equity (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Changes In Equity [Line Items]
Balance, beginning of period	$ 10,430	$ 11,196	$ 10,477	$ 11,073
Cumulative impact from adoption of new accounting standards			20
Net income (loss)	119	(66)	247	21
Other comprehensive income (loss)	(134)	19	(237)	135
Dividends	0	0	(82)	(80)
Other	19	9	9	9
Balance, end of period	$ 10,434	11,158	$ 10,434	11,158
Class A Common Stock [Member]
Changes In Equity [Line Items]
Balance, beginning of period, Shares			383,385,353
Balance, end of period, Shares	385,259,814		385,259,814
Class B Common Stock [Member]
Changes In Equity [Line Items]
Balance, beginning of period, Shares			199,630,240
Balance, end of period, Shares	199,630,240		199,630,240
Common Stock [Member] | Class A Common Stock [Member]
Changes In Equity [Line Items]
Balance, beginning of period	$ 4	$ 4	$ 4	$ 4
Balance, beginning of period, Shares	385,000,000	383,000,000	383,000,000	382,000,000
Net income (loss)	$ 0	$ 0	$ 0	$ 0
Other comprehensive income (loss)	0	0	0	0
Dividends	0	0	0	0
Other	0	0	$ 0	$ 0
Other, Shares			2,000,000	1,000,000
Balance, end of period	$ 4	$ 4	$ 4	$ 4
Balance, end of period, Shares	385,000,000	383,000,000	385,000,000	383,000,000
Common Stock [Member] | Class B Common Stock [Member]
Changes In Equity [Line Items]
Balance, beginning of period	$ 2	$ 2	$ 2	$ 2
Balance, beginning of period, Shares	200,000,000	200,000,000	200,000,000	200,000,000
Net income (loss)	$ 0	$ 0	$ 0	$ 0
Other comprehensive income (loss)	0	0	0	0
Dividends	0	0	0	0
Other	0	0	0	0
Balance, end of period	$ 2	$ 2	$ 2	$ 2
Balance, end of period, Shares	200,000,000	200,000,000	200,000,000	200,000,000
Additional Paid-in Capital [Member]
Changes In Equity [Line Items]
Balance, beginning of period	$ 12,257	$ 12,340	$ 12,322	$ 12,395
Net income (loss)	0	0	0	0
Other comprehensive income (loss)	0	0	0	0
Dividends	0	0	(59)	(59)
Other	14	10	8	14
Balance, end of period	12,271	12,350	12,271	12,350
Accumulated Deficit [Member]
Changes In Equity [Line Items]
Balance, beginning of period	(2,032)	(581)	(2,163)	(648)
Cumulative impact from adoption of new accounting standards			32
Net income (loss)	95	(83)	196	(15)
Other comprehensive income (loss)	0	0	0	0
Dividends	0	0	0	0
Other	0	0	(2)	(1)
Balance, end of period	(1,937)	(664)	(1,937)	(664)
Accumulated Other Comprehensive Loss [Member]
Changes In Equity [Line Items]
Balance, beginning of period	(970)	(852)	(874)	(964)
Cumulative impact from adoption of new accounting standards			(22)
Net income (loss)	0	0	0	0
Other comprehensive income (loss)	(106)	20	(181)	132
Dividends	0	0	0	0
Other	0	0	1	0
Balance, end of period	(1,076)	(832)	(1,076)	(832)
Total News Corporation Equity
Changes In Equity [Line Items]
Balance, beginning of period	9,261	10,913	9,291	10,789
Cumulative impact from adoption of new accounting standards			10
Net income (loss)	95	(83)	196	(15)
Other comprehensive income (loss)	(106)	20	(181)	132
Dividends	0	0	(59)	(59)
Other	14	10	7	13
Balance, end of period	9,264	10,860	9,264	10,860
Noncontrolling Interest [Member]
Changes In Equity [Line Items]
Balance, beginning of period	1,169	283	1,186	284
Cumulative impact from adoption of new accounting standards			10
Net income (loss)	24	17	51	36
Other comprehensive income (loss)	(28)	(1)	(56)	3
Dividends	0	0	(23)	(21)
Other	5	(1)	2	(4)
Balance, end of period	$ 1,170	$ 298	$ 1,170	$ 298