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Stock Compensation Plan (Schedule Of Share Based Compensation Option And SARs Award Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
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Jul. 31, 2013 | Jul. 31, 2012 | Jul. 31, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |  |
Awards, outstanding beginning balance (in shares) | 3,170 | 2,661 | 2,377
Awards, granted (in shares) | 412 | 651 | 371
Awards, exercised (in shares) | (735) | (74) | (67)
Awards, forfeited or expired (in shares) | (94) | (68) | (20)
Awards, outstanding ending balance (in shares) | 2,753 | 3,170 | 2,661
Awards, exercisable ending balance (in shares) | 1,873 |  |
Weighted-average exercise price, outstanding beginning balance (in dollars per share) | $ 34.20 | $ 32.02 | $ 30.80
Weighted-average exercise price, granted (in dollars per share) | $ 57.43 | $ 41.94 | $ 37.40
Weighted-average exercise price, exercised (in dollars per share) | $ 33.22 | $ 27.10 | $ 20.06
Weighted-average exercise price, forfeited or expired (in dollars per share) | $ 43.21 | $ 30.77 | $ 28.59
Weighted-average exercise price, outstanding ending balance (in dollars per share) | $ 37.63 | $ 34.20 | $ 32.02
Weighted-average exercise price, exercisable ending balance (in dollars per share) | $ 32.39 |  |
Weighted-average remaining contractual term, outstanding ending balance (in years) | 6 years 2 months 8 days |  |
Weighted-average remaining contractual term, exercisable ending balance (in years) | 5 years 1 month 6 days |  |
Aggregate intrinsic value, outstanding ending balance | $ 80,847 |  |
Aggregate intrinsic value, exercisable ending balance | $ 64,787 |  |

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- Definition The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options and stock appreciation rights outstanding and currently exercisable under the option plan as of the balance sheet date. + References No definition available. + Details
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- Definition The number of shares into which fully or partially vested stock options and stock appreciation rights outstanding as of the balance sheet date can be currently converted under the plan. + References No definition available. + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options and stock appreciation rights outstanding and currently exercisable under the plan. + References No definition available. + Details
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- Definition The weighted average period between the balance sheet date and expiration for all vested portions of options and stock appreciation rights outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years. + References No definition available. + Details
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- Definition The weighted average price at which option and stock appreciation right holders acquired shares when converting their stock options or stock appreciation rights into shares under the plan during the reporting period. + References No definition available. + Details
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- Definition For presentations that combine terminations, the number of shares under options and stock appreciation rights that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the plan or that expired. + References No definition available. + Details
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- Definition The combined weighted average exercise price associated with stock options and stock appreciation rights during the period that have either lapsed or been forfeited. + References No definition available. + Details
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- Definition The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options and stock appreciation rights awarded under the plan during the reporting period. + References No definition available. + Details
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- Definition The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options and stock appreciation rights outstanding under the plan as of the balance sheet date. + References No definition available. + Details
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- Definition The weighted average period between the balance sheet date and expiration for all awards of options and stock appreciation rights outstanding under the plan, which may be expressed in a decimal value for number of years. + References No definition available. + Details
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