Components of Other Income (Expense), Net (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Other Income And Expenses [Abstract]
Dividends and interest income	$ 575	$ 380	$ 1,578	$ 984
Interest expense	(691)	(609)	(2,061)	(1,567)
Net recognized gains on investments	510	790	1,851	1,893
Net losses on derivatives	(72)	(200)	(206)	(340)
Net gains (losses) on foreign currency remeasurements	20	50	(49)	(143)
Other, net	7	(40)	2	(227)
Total	$ 349	$ 371	$ 1,115	$ 600