Components of Other Income (Expense), Net (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Other Income And Expenses [Abstract]
Interest and dividends income	$ 681	$ 473
Interest expense	(674)	(672)
Net recognized gains on investments	243	573
Net losses on derivatives	(3)	(50)
Net gains (losses) on foreign currency remeasurements	5	(9)
Other, net	14	(39)
Total	$ 266	$ 276