Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			6 Months Ended
	Feb. 29, 2016	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017
Loss Contingencies [Line Items]
Litigation amount payment to plaintiffs				$ 250
Litigation settlement	$ 30
Other current assets		$ 483			$ 483		$ 523
U.K. Newspaper Matters [Member]
Loss Contingencies [Line Items]
Selling, general and administrative expenses (benefit), net		3	$ 2		(40)	$ 4
Litigation liability accrued		54			54
Impact due to reversal of previous accrued liability due to settlement with tax authority		46			46
U.K. Newspaper Matters Indemnification [Member] | 21st Century Fox [Member]
Loss Contingencies [Line Items]
Other current assets		$ 52			$ 52