Employee Benefit Plans (Narrative) (Details) $ in Millions	12 Months Ended
	Jul. 31, 2020 USD ($)	Jul. 31, 2019 USD ($) pension_plan	Jul. 31, 2018 USD ($)	Jul. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of U.S. pension plan types | pension_plan		2
Defined contribution plan, annual retirement contributions, percent		3.00%
Deferred compensation arrangement with individual, maximum future deferred receipts allowed		75.00%
Deferred compensation arrangement with individual, recorded liability		$ 5.0	$ 5.7
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net underfunded status		18.2	1.9
Unrealized losses recognized		152.0	130.8
Loss anticipated to be recognized in net periodic pension expense		6.4
Accumulated benefit obligation		499.1	469.3
Projected benefit obligation for pension plans with projected benefit obligations in excess of plan assets		190.6	68.4
Fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets		165.6	50.3
Projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets		135.0	18.7
Accumulated benefit obligation for plans with projected benefit obligations in excess of plan assets		133.2	16.9
Fair value of plan assets for plans with projected benefit obligations in excess of plan assets		122.5	6.2
Company contributions		$ 10.4	37.6
Pension Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Percentage of fund held in other collective investment vehicles		100.00%
Pension Plan | Private equity and other funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Strategic asset allocation, fixed income securities, minimum		80.00%
Strategic asset allocation, fixed income securities, maximum		90.00%
Pension Plan | Equity Securities | Level 3 | Maximum
Defined Benefit Plan Disclosure [Line Items]
Pension plan target allocation percentage		20.00%
Pension Plan | Equity Securities | Level 3 | Minimum
Defined Benefit Plan Disclosure [Line Items]
Pension plan target allocation percentage		10.00%
Pension Plan | Non - U.S. Plan
Defined Benefit Plan Disclosure [Line Items]
Long-term rate of return on plan assets		3.76%
Company contributions		$ 0.9
Expected future employer contributions		1.1
Pension Plan | Non - U.S. Plan | Level 3
Defined Benefit Plan Disclosure [Line Items]
Unrealized losses recognized		$ (3.5)	4.0	$ (1.2)
Pension Plan | U.S. Plan
Defined Benefit Plan Disclosure [Line Items]
Long-term rate of return on plan assets		6.08%
Company contributions		$ 1.4
Expected future employer contributions		4.4
Defined Contribution Plan, Employer Discretionary Contribution Amount		$ 8.0
Retirement Savings and Employee Stock Ownership Plan | U.S. Plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, annual retirement contributions, percent		3.00%
Company contributions		$ 23.5	$ 22.1	$ 20.1
Contributory employee saving plan, employee contribution threshold limit from compensation, maximum		50.00%
Contributory employee saving plan, percentage match of participants, first contributions		100.00%
Contributory employee saving plan, percentage of participants, first eligible compensation		3.00%
Contributory employee saving plan, percentage match of participants, second contributions		50.00%
Contributory employee saving plan, percentage of participants, second eligible compensation		2.00%
Scenario, Forecast | Pension Plan | U.S. Plan
Defined Benefit Plan Disclosure [Line Items]
Company contributions	$ 1.5