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Employee Benefit Plans (Changes In Fair Value Of Assets Held By International Pension Plans' Level 3 Assets) (Details) (International Assets [Member], USD $)
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12 Months Ended | ||
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Jul. 31, 2012
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Jul. 31, 2011
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Jul. 31, 2010
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| Defined Benefit Plan Disclosure [Line Items] | |||
| Ending balance | $ 113,300,000 | $ 108,200,000 | $ 87,200,000 |
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Equity/Fixed Income [Member]
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| Defined Benefit Plan Disclosure [Line Items] | |||
| Ending balance | 35,100,000 | 41,700,000 | 34,200,000 |
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Significant Unobservable Inputs (Level 3) [Member]
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| Defined Benefit Plan Disclosure [Line Items] | |||
| Ending balance | 21,800,000 | 26,300,000 | 21,700,000 |
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Significant Unobservable Inputs (Level 3) [Member] | Equity/Fixed Income [Member]
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| Defined Benefit Plan Disclosure [Line Items] | |||
| Beginning balance | 26,300,000 | 21,700,000 | 23,100,000 |
| Unrealized gains | 1,400,000 | 900,000 | 300,000 |
| Foreign currency exchange | (3,800,000) | 2,500,000 | (1,900,000) |
| Purchases, sales, issuances and settlements, net | (2,000,000) | 1,200,000 | 200,000 |
| Ending balance | $ 21,800,000 | $ 26,300,000 | $ 21,700,000 |