Net Recognized Gains (Losses) on Equity Investments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Net realized gains (losses) on investments sold	$ 15	$ (13)	$ 29	$ 77
Net unrealized gains (losses) on investments still held	(7)	144	156	109
Total	(25)	105	(63)	103
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)	0	(199)	(16)
Total	$ (12)	$ 131	$ (14)	$ 170