Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions				12 Months Ended
		Feb. 20, 2019	Nov. 20, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Loss Contingencies [Line Items]
Net benefit liability recognized for pension and other postretirement benefit plans				$ 558
U.K. Newspaper Matters Indemnity
Loss Contingencies [Line Items]
Liability related to indemnity				50	$ 50
Shareholder Litigation
Loss Contingencies [Line Items]
Settlement amount to be received from insurer			$ 90
Attorneys' fees and expenses			$ 22
Governance and compliance enhancements, effective period			5 years
Settlement amount, net of attorneys' fees and expenses	[1]			0	$ 68	$ 0
Profits Participants Litigation
Loss Contingencies [Line Items]
Arbitrator award to the plaintiffs		$ 129
Land and Buildings
Loss Contingencies [Line Items]
Total operating leases				725
Land and Buildings | News Corp
Loss Contingencies [Line Items]
Total amount to be received from subleases of office facilities				$ 45

[1] See Note 13—Commitments and Contingencies under the heading “Shareholder Litigation”.