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Stock Compensation Plan (Schedule Of Share Based Compensation Option And SARs Award Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
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Jul. 31, 2017 | Jul. 31, 2016 | Jul. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |  |
Awards, outstanding beginning balance (in shares) | 2,381 | 2,385 | 2,756
Awards, granted (in shares) | 143 | 198 | 242
Awards, exercised (in shares) | (215) | (180) | (575)
Awards, forfeited or expired (in shares) | (19) | (22) | (38)
Awards, outstanding ending balance (in shares) | 2,290 | 2,381 | 2,385
Awards, exercisable ending balance (in shares) | 1,972 |  |
Weighted-average exercise price, outstanding beginning balance (in dollars per share) | $ 52.98 | $ 47.96 | $ 42.06
Weighted-average exercise price, granted (in dollars per share) | 174.42 | 113.67 | 91.64
Weighted-average exercise price, exercised (in dollars per share) | 60.05 | 49.79 | 36.20
Weighted-average exercise price, forfeited or expired (in dollars per share) | 108.06 | 80.42 | 75.99
Weighted-average exercise price, outstanding ending balance (in dollars per share) | 59.12 | $ 52.98 | $ 47.96
Weighted-average exercise price, exercisable ending balance (in dollars per share) | $ 46.84 |  |
Weighted-average remaining contractual term, outstanding ending balance (in years) | 4 years 5 months |  |
Weighted-average remaining contractual term, exercisable ending balance (in years) | 3 years 8 months |  |
Aggregate intrinsic value, outstanding ending balance | $ 347,214 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number | 2,267 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price | $ 58.38 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term | 4 years 4 months |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value | $ 345,458 |  |
Aggregate intrinsic value, exercisable ending balance | $ 323,243 |  |

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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 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 number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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