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) |