Notional and Fair Values of All Derivative Instruments (Detail) (USD $) In Thousands | Aug. 31, 2011 | Aug. 31, 2010 |
|---|---|---|
| Assets | ||
| Fair value of derivative assets | $ 79,243 | $ 29,190 |
| Liabilities | ||
| Fair value of derivative liabilities | 20,570 | 22,870 |
| Total fair value | 58,673 | 6,320 |
| Total notional value | 4,127,456 | 2,590,314 |
Cash Flow Hedging | Other Current Assets | ||
| Assets | ||
| Fair value of derivative assets | 21,714 | 10,806 |
Cash Flow Hedging | Other Non-Current Assets | ||
| Assets | ||
| Fair value of derivative assets | 43,666 | 13,962 |
Cash Flow Hedging | Other Accrued Liabilities | ||
| Liabilities | ||
| Fair value of derivative liabilities | 4,649 | 9,845 |
Cash Flow Hedging | Other Non-Current Liabilities | ||
| Liabilities | ||
| Fair value of derivative liabilities | 698 | 5,202 |
Other Derivatives | Other Current Assets | ||
| Assets | ||
| Fair value of derivative assets | 13,863 | 4,422 |
Other Derivatives | Other Accrued Liabilities | ||
| Liabilities | ||
| Fair value of derivative liabilities | $ 15,223 | $ 7,823 |