Leases (Summary of Lease Costs and Supplemental Cash Flows Information) (Details) - USD ($) $ in Millions		12 Months Ended
		Jun. 30, 2021	Jun. 30, 2020
Lease costs
Total lease costs	[1]	$ 126	$ 126
Supplemental cash flows information
Operating cash flows from operating leases		134	166
ROU assets obtained in exchange for operating lease liabilities		$ 49	$ 87

[1] Total lease costs of $126 million for the years ended June 30, 2021 and 2020 are net of sublease income of approximately $30 million and $50 million, respectively. Approximately $15 million and $40 million of the sublease income for the years ended June 30, 2021 and 2020, respectively, relates to office facilities that were subleased through November 2020 to News Corporation.