Components of Other Income (Expense), Net (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Other Income And Expenses [Abstract]
Dividends and interest income	$ 2,214	$ 1,387	$ 903
Interest expense	(2,733)	(2,222)	(1,243)
Net recognized gains on investments	2,399	2,583	668
Net losses on derivatives	(187)	(510)	(443)
Net losses on foreign currency remeasurements	(218)	(111)	(129)
Other, net	(59)	(251)	(195)
Total	$ 1,416	$ 876	$ (439)