Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Defined Benefit Plan Disclosure
Deferred compensation arrangement with individual, maximum future deferred receipts allowed (percent)		75.00%
Deferred compensation arrangement with individual, recorded liability		$ 2.6	$ 3.3
Pension Plan
Defined Benefit Plan Disclosure
Net overfunded (underfunded)		17.2	11.4
Unrealized losses recognized		110.2	119.1
Loss anticipated to be recognized in net periodic pension expense		2.8	5.3	$ 7.2
Accumulated benefit obligation		424.1	556.5
Projected benefit obligation for pension plans with projected benefit obligations in excess of plan assets		70.3	83.6
Fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets		49.2	57.4
Projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets		12.8	13.8
Accumulated benefit obligation for plans with projected benefit obligations in excess of plan assets		12.8	13.8
Fair value of plan assets for plans with projected benefit obligations in excess of plan assets		3.1	3.1
Cash and credit contributions		2.3
Company contributions		$ 2.3	3.1
Pension Plan | Fixed income securities | Level 3 | Independent Insurance Company | Minimum
Defined Benefit Plan Disclosure
Pension plan target allocation percentage		80.00%
Pension Plan | Fixed income securities | Level 3 | Independent Insurance Company | Maximum
Defined Benefit Plan Disclosure
Pension plan target allocation percentage		90.00%
Pension Plan | Global equity securities | Level 3 | Independent Insurance Company | Minimum
Defined Benefit Plan Disclosure
Pension plan target allocation percentage		10.00%
Pension Plan | Global equity securities | Level 3 | Independent Insurance Company | Maximum
Defined Benefit Plan Disclosure
Pension plan target allocation percentage		20.00%
Pension Plan | Subsequent Event | Scenario, Forecast
Defined Benefit Plan Disclosure
Loss anticipated to be recognized in net periodic pension expense	$ 2.2
Retirement Savings and Employee Stock Ownership Plan | U.S. Plan
Defined Benefit Plan Disclosure
Company contributions		$ 27.2	$ 25.2	$ 22.0
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%
Defined contribution plan, annual retirement contributions (percent)		3.00%