v3.5.0.2
Non-Designated Derivative Gains (Losses) (Detail) - USD ($)
$ in Millions
 3 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]    
Changes in fair value of derivatives not designated as hedges $ (64) $ 3
Foreign Exchange Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Changes in fair value of derivatives not designated as hedges (31) 59
Equity Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Changes in fair value of derivatives not designated as hedges (17) 34
Interest Rate Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Changes in fair value of derivatives not designated as hedges 4 (1)
Credit Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Changes in fair value of derivatives not designated as hedges 2 (5)
Commodity Contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Changes in fair value of derivatives not designated as hedges $ (22) $ (84)