Gains (Losses) on Fair Value Hedges and Related Hedged Items (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Foreign Exchange Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives	$ 73	$ 35	$ 59	$ 23
Hedged items	(74)	(35)	(61)	(21)
Total amount of ineffectiveness	(1)	0	(2)	2
Equity Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives	(10)	0	(10)	0
Hedged items	10	0	10	0
Total amount of ineffectiveness	0	0	0	0
Amount of equity contracts excluded from effectiveness assessment	$ (26)	$ 0	$ (26)	$ 0