Employee Benefit Plans (Narrative) (Details) $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2020 USD ($)	Jul. 31, 2020 USD ($) pension_plan	Jul. 31, 2019 USD ($)	Jul. 31, 2018 USD ($)
Defined Benefit Plan Disclosure
Deferred compensation arrangement with individual, maximum future deferred receipts allowed (percent)		75.00%
Deferred compensation arrangement with individual, recorded liability		$ 4.1	$ 5.0
U.S. Plan
Defined Benefit Plan Disclosure
Number of U.S. pension plan types | pension_plan		2
Defined contribution plan, annual retirement contributions (percent)		3.00%
Pension Plan
Defined Benefit Plan Disclosure
Net underfunded status		$ 35.0	18.2
Unrealized losses recognized		166.1	152.0
Loss anticipated to be recognized in net periodic pension expense		8.8
Accumulated benefit obligation		561.9	499.1
Projected benefit obligation for pension plans with projected benefit obligations in excess of plan assets		220.4	190.6
Fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets		179.3	165.6
Projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets		158.0	135.0
Accumulated benefit obligation for plans with projected benefit obligations in excess of plan assets		156.2	133.2
Fair value of plan assets for plans with projected benefit obligations in excess of plan assets		133.1	122.5
Company contributions		$ 3.0	10.4
Pension Plan | Maximum
Defined Benefit Plan Disclosure
Percentage of fund held in other collective investment vehicles (percent)		100.00%
Pension Plan | Fixed income securities | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure
Strategic asset allocation, fixed income securities, minimum (percent)		80.00%
Strategic asset allocation, fixed income securities, maximum (percent)		90.00%
Pension Plan | Global equity securities | Significant Unobservable Inputs (Level 3) | Maximum
Defined Benefit Plan Disclosure
Pension plan target allocation (percent)		20.00%
Pension Plan | Global equity securities | Significant Unobservable Inputs (Level 3) | Minimum
Defined Benefit Plan Disclosure
Pension plan target allocation (percent)		10.00%
Pension Plan | Non - U.S. Plan
Defined Benefit Plan Disclosure
Long-term rate of return on plan assets (percent)		3.78%
Company contributions		$ 1.0
Expected future employer contributions		1.6
Pension Plan | Non - U.S. Plan | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure
Unrealized losses recognized		$ (4.1)	(3.5)	$ 4.0
Pension Plan | U.S. Plan
Defined Benefit Plan Disclosure
Long-term rate of return on plan assets (percent)		6.08%
Company contributions		$ 4.0
Expected future employer contributions		4.0
Pension Plan | U.S. Plan | Subsequent Event
Defined Benefit Plan Disclosure
Company contributions	$ 0.9
Non-qualified pension plan | U.S. Plan
Defined Benefit Plan Disclosure
Company contributions		1.5
Expected future employer contributions		$ 1.5
Retirement Savings and Employee Stock Ownership Plan | U.S. Plan
Defined Benefit Plan Disclosure
Defined contribution plan, annual retirement contributions (percent)		3.00%
Company contributions		$ 22.0	$ 23.5	$ 22.1
Contributory employee saving plan, employee contribution threshold limit from compensation, maximum (percent)		50.00%
Contributory employee saving plan, percentage match of participants, first contributions (percent)		100.00%
Contributory employee saving plan, percentage of participants, first eligible compensation (percent)		3.00%
Contributory employee saving plan, percentage match of participants, second contributions (percent)		50.00%
Contributory employee saving plan, percentage of participants, second eligible compensation (percent)		2.00%