Net Recognized Gains (Losses) on Equity Investments (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Net realized gains on investments sold	$ 29	$ 123	$ 83
Net unrealized gains on investments still held	509	1,057	69
Total	461	1,232	32
Equity Securities
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Impairments of investments	(20)	(11)	(116)
Total	$ 518	$ 1,169	$ 36