Summary of Significant Accounting Policies - Revision of Prior Periods (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative	$ (2,995)	$ (3,191)	$ (3,049)
Digital Real Estate Services
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(614)
Subscription Video Services
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(347)
Dow Jones
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(586)
Book Publishing
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(328)
News Media
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(1,158)
Other
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(158)
Selling, general and administrative reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		0
Selling, general and administrative reclassification | Digital Real Estate Services
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(6)
Selling, general and administrative reclassification | Subscription Video Services
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(1)
Selling, general and administrative reclassification | Dow Jones
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(4)
Selling, general and administrative reclassification | Book Publishing
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(1)
Selling, general and administrative reclassification | News Media
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(23)
Selling, general and administrative reclassification | Other
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		35
As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(3,191)
As Reported | Digital Real Estate Services
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(608)
As Reported | Subscription Video Services
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(346)
As Reported | Dow Jones
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(582)
As Reported | Book Publishing
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(327)
As Reported | News Media
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		(1,135)
As Reported | Other
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative		$ (193)