Additional Financial Information - Components of Other Non-Current Assets (Detail) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2020	Jun. 30, 2020
Other Income and Expenses [Line Items]
Royalty advances to authors	$ 354	$ 348
Retirement benefit assets	121	94
Inventory	285	133
News America Marketing deferred consideration	120	111
Other	313	353
Total Other non-current assets	$ 1,193	1,039
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201902Member
Inventory, net	$ (203)	$ (348)
Revision of Prior Period, Accounting Standards Update, Adjustment | Accounting Standards Update 2019-02
Other Income and Expenses [Line Items]
Total Other non-current assets	151
Inventory, net	$ 151