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Revenues - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
Revenues - Additional Information (Detail) - USD ($)	Jul. 02, 2018	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		$ 2,457,000,000	$ 2,093,000,000	$ 7,608,000,000	$ 6,331,000,000
Revenue from performance obligation		75,000,000		227,000,000
Revenue from remaining performance obligation		297,000,000		297,000,000
Impact on net income		23,000,000	(1,110,000,000)	270,000,000	(1,089,000,000)
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to retained earnings	$ 20,000,000
ASC 606 [Member] \| Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		(17,000,000)		(54,000,000)
Impact on net income		1,000,000		14,000,000
Subscription Video Services [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		539,000,000	$ 129,000,000	1,666,000,000	$ 394,000,000
Reclassification of Marketing and Sales Incentive Payments [Member] \| Subscription Video Services, Book Publishing and News and Information Services [Member] \| ASC 606 [Member] \| Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		(22,000,000)		(84,000,000)
Impact on net income		0		0
Installation Operations [Member] \| Subscription Video Services [Member] \| ASC 606 [Member] \| Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		$ 5,000,000		$ 18,000,000
Financial Services [Member] \| REA Group Inc [Member] \| Accounting Standards Update 2014-09 [Member] \| Commission Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Commission receivable	121,000,000
Financial Services [Member] \| REA Group Inc [Member] \| Accounting Standards Update 2014-09 [Member] \| Commission Payable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Commission payable	$ 94,000,000