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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Jul. 31, 2019 | [1] | Apr. 30, 2019 | [1] | Jan. 31, 2019 | [1] | Oct. 31, 2018 | [1] | Jul. 31, 2018 | [1] | Apr. 30, 2018 | [1] | Jan. 31, 2018 | [1] | Oct. 31, 2017 | [1] | Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2017
Income From Continuing Operations Before Taxes [Abstract] |  |  |  |  |  |  |  |  |  |  |
Income before income taxes | $ 187,070 | $ 204,129 | $ 164,966 | $ 148,786 | $ 132,729 | $ 171,216 | $ 144,438 | $ 114,128 | $ 704,951 | $ 562,511 | $ 440,100
UNITED STATES |  |  |  |  |  |  |  |  |  |  |
Income From Continuing Operations Before Taxes [Abstract] |  |  |  |  |  |  |  |  |  |  |
U.S. |  |  |  |  |  |  |  |  | 634,874 | 501,961 | 385,526
International [Member] |  |  |  |  |  |  |  |  |  |  |
Income From Continuing Operations Before Taxes [Abstract] |  |  |  |  |  |  |  |  |  |  |
International |  |  |  |  |  |  |  |  | $ 70,077 | $ 60,550 | $ 54,574
[1] | Earnings per share were computed independently for each of the periods presented; therefore, the sum of the earnings per share amounts for the quarters may not equal the total for the year.

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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(10)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(8)) -URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(15)) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
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