Gains (Losses) on Fair Value Hedges and Related Hedged Items (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Foreign Exchange Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives	$ (331)	$ 31	$ (364)	$ 653
Hedged items	340	(23)	390	(647)
Total amount of ineffectiveness	9	8	26	6
Equity Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives	15	(25)	(77)	(88)
Hedged items	(15)	25	77	88
Total amount of ineffectiveness	0	0	0	0
Amount of equity contracts excluded from effectiveness assessment	$ (12)	$ 5	$ (8)	$ (8)