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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Jul. 31, 2022
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2019
Income Tax Contingency        
Deferred tax asset, federal foreign tax credit $ 3.0      
Deferred tax asset, research and development credit 3.4      
Operating losses and tax credit carryforward valuation allowance 3.4 $ 4.6 $ 8.1 $ 4.4
Undistributed earnings 1,100.0      
Undistributed earnings not considered reinvested 888.5      
Undistributed earnings tax charge 6.4      
Undistributed earnings considered reinvested 224.8      
Transition tax not due within 12 months 53.1      
Gross accrued interest and penalties 1.1 $ 1.6    
Interest expense recognized 0.4      
Unrecognized tax benefits $ 3.1      
Foreign Tax Credits        
Income Tax Contingency        
Credit carry forward term (years) 10 years      
Research And Development Credits | Minimum        
Income Tax Contingency        
Credit carry forward term (years) 1 year      
Research And Development Credits | Maximum        
Income Tax Contingency        
Credit carry forward term (years) 20 years