Gains (Losses) on Fair Value Hedges and Related Hedged Items (Detail) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Foreign Exchange Contracts | ||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Derivatives | $ (48) | $ (81) |
| Hedged items | 68 | 91 |
| Total amount of ineffectiveness | 20 | 10 |
| Equity Contracts | ||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Derivatives | (10) | (33) |
| Hedged items | 10 | 33 |
| Total amount of ineffectiveness | 0 | 0 |
| Amount of equity contracts excluded from effectiveness assessment | $ (3) | $ 19 |