Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Income Tax Contingency
Operating losses and tax credit carryforward valuation allowance	$ 8.1
Undistributed earnings	1,300.0
Undistributed earnings not considered reinvested	1,100.0
Undistributed earnings tax charge	9.8
Undistributed earnings considered reinvested	230.0
Transition tax not due within 12 months	68.3
Interest expense recognized	0.7
Gross accrued interest and penalties	2.2	$ 1.6
Unrecognized tax benefits	5.4
Domestic Tax Authority
Income Tax Contingency
Operating losses and tax credit carryforward amount	$ 2.4
Operating losses and tax credit carryforward expiration period	10 years
State and Local Jurisdiction
Income Tax Contingency
Operating losses and tax credit carryforward amount	$ 2.5
State and Local Jurisdiction | Minimum
Income Tax Contingency
Operating losses and tax credit carryforward expiration period	1 year
State and Local Jurisdiction | Maximum
Income Tax Contingency
Operating losses and tax credit carryforward expiration period	20 years
Foreign Tax Authority
Income Tax Contingency
Operating losses and tax credit carryforward amount	$ 3.2
Foreign Tax Authority | Minimum
Income Tax Contingency
Operating losses and tax credit carryforward expiration period	1 year