| **Stock Compensation Plan (Tables)**                                          | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
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| **Disclosure of Compensation Related Costs, Share-based Payments [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| Schedule Of Share Based Compensation Valuation Model                          | The risk-free rate for periods within the contractual life of the equity award is based on the United States Treasury yield curve in effect at the time of grant. Year Ended July 31,  201420132012Expected volatility41.2%42.6%42.8%Expected dividends1.2%1.5%1.5%Expected term (average in years)5.5-5.96.0-6.25.1-5.3Risk-free rate0.1-2.8%0.2-1.6%0.1-2.2%                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| Schedule Of Share Based Compensation Option And SARs Award Activity           | A summary of aggregate option and SARs award activity under the Plan as of July 31, 2012, 2013 and 2014, and changes during the years then ended is presented below (in thousands, except exercise price and contractual term):  AwardsWeighted-AverageExercise PriceWeighted-AverageRemainingContractual TermAggregateIntrinsicValueOutstanding at, August 1, 20112,661$32.02  Granted65141.94  Exercised(74)27.10  Forfeited or expired(68)30.77  Outstanding at, July 31, 20123,170$34.20  Granted41257.43  Exercised(735)33.22  Forfeited or expired(94)43.21  Outstanding at, July 31, 20132,753$37.63  Granted35273.13  Exercised(321)37.62  Forfeited or expired(28)48.87  Outstanding at, July 31, 20142,756$42.065.8 years$93,034Exercisable at, July 31, 20141,973$34.454.8 years$80,987 |
| Schedule of Share Based Compensation SARs Activity                            | A summary of the status of the Company’s nonvested SARs as of July 31, 2014, and changes during the year then ended, is presented below (in thousands, except fair value amounts):  AwardsWeighted-AverageGrant-DateFair ValueOutstanding at, July 31, 2013880$16.06Granted35223.60Vested(421)15.30Forfeited(28)17.00Nonvested at, July 31, 2014783$19.42                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Schedule Of Share Based Compensation Restricted Stock Units Activity          | A summary of the status of the Company’s nonvested restricted share units as of July 31, 2014, and changes during the year then ended, is presented below (in thousands, except fair value amounts):  AwardsWeighted-AverageGrant-DateFair ValueOutstanding at, July 31, 2013315$45.21Granted15267.48Vested(166)41.91Forfeited(27)54.19Nonvested at, July 31, 2014274$58.68                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |

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| - Definition
Tabular disclosure of the changes in outstanding nonvested restricted stock units.
+ References
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| - Definition
Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.
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| - Definition
Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year.
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| - Definition
Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.
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