Allowance for Doubtful Accounts (Detail) - Allowance for doubtful accounts - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	$ 816	$ 434	$ 397
Charged to costs and other	234	560	153
Write-offs	(252)	(178)	(116)
Balance, end of period	798	816	434
Accounts receivable, net of allowance for doubtful accounts
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	788	411
Balance, end of period	751	788	411
Other Long-term Assets
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance, beginning of period	28	23
Balance, end of period	$ 47	$ 28	$ 23