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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	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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The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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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.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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