Leases (Summary of Lease Costs and Supplemental Cash Flows Information) (Parenthetical) (Details) $ in Millions	12 Months Ended
	Jun. 30, 2020 USD ($)
Lease Costs [Abstract]
Lease costs	$ 126	[1]
Sublease income	50
Office Facility | News Corporation
Lease Costs [Abstract]
Sublease income	$ 40

[1] Total lease costs of $126 million for the year ended June 30, 2020 are net of sublease income of approximately $50 million, of which approximately $40 million relates to office facilities that have been subleased to News Corporation.