Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2021	Jun. 30, 2020
Loss Contingencies [Line Items]
Total firm commitments and future debt payments	$ 48,000	$ 37,000
U.K. Newspaper Matters Indemnity
Loss Contingencies [Line Items]
Liability related to indemnity	$ 50	$ 65

Amount of loss contingency liability expected to be resolved within one year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Name:	us-gaap_LossContingencyAccrualCarryingValueCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant