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Income Taxes (Tables)
 6 Months Ended
Jan. 31, 2019
Income Tax Disclosure [Abstract]  
Reconciliation of consolidated effective income tax rate between periods
A reconciliation of the consolidated effective income tax rate is as follows:
 
Three Months Ended
 
Six Months Ended
Effective Rate, January 31, 2018
(3.6
)%
 
11.9
 %
Deferred tax revaluation
27.5
 %
 
13.7
 %
U.S. federal statutory rate decrease
(5.8
)%
 
(5.8
)%
Prior quarter true-up due to U.S. federal statutory rate decrease
8.2
 %
 
—
 %
Foreign operations
(1.8
)%
 
1.6
 %
State taxes
0.1
 %
 
0.5
 %
Excess tax benefit
(0.9
)%
 
1.2
 %
Other
2.0
 %
 
2.2
 %
Effective Rate, January 31, 2019
25.7
 %
 
25.3
 %