Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Jun. 30, 2020
Loss Contingencies [Line Items]
Total firm commitments and future debt payments	$ 34,000	$ 37,000
U.K. Newspaper Matters Indemnity
Loss Contingencies [Line Items]
Liability related to indemnity	$ 55	$ 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

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