Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Defined Benefit Plan Disclosure
Loss anticipated to be recognized in net periodic pension expense	$ 6.2	$ 2.8	$ 5.3
Deferred compensation arrangement with individual, maximum future deferred receipts allowed (as a percent)	75.00%
Deferred compensation arrangement with individual, recorded liability	$ 1.9	2.6
Pension Plan
Defined Benefit Plan Disclosure
Net overfunded (underfunded)	14.9	17.2
Unrealized losses recognized	109.0	110.2
Accumulated benefit obligation	384.4	424.1
Projected benefit obligation for pension plans with projected benefit obligations in excess of plan assets	73.5	70.3
Fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets	53.7	49.2
Projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets	15.0	12.8
Accumulated benefit obligation for plans with projected benefit obligations in excess of plan assets	15.0	12.8
Fair value of plan assets for plans with projected benefit obligations in excess of plan assets	5.0	3.1
Cash and credit contributions	2.6
Company contributions	$ 2.6	2.3
Pension Plan | Minimum | Fixed income securities | Level 3 | Independent Insurance Company
Defined Benefit Plan Disclosure
Pension plan target allocation (as a percent)	80.00%
Pension Plan | Minimum | Global equity securities | Level 3 | Independent Insurance Company
Defined Benefit Plan Disclosure
Pension plan target allocation (as a percent)	10.00%
Pension Plan | Maximum | Fixed income securities | Level 3 | Independent Insurance Company
Defined Benefit Plan Disclosure
Pension plan target allocation (as a percent)	90.00%
Pension Plan | Maximum | Global equity securities | Level 3 | Independent Insurance Company
Defined Benefit Plan Disclosure
Pension plan target allocation (as a percent)	20.00%
Retirement Savings and Employee Stock Ownership Plan | U.S. Plan
Defined Benefit Plan Disclosure
Contributory employee saving plan, employee contribution threshold limit from compensation, maximum (as a percent)	50.00%
Contributory employee saving plan, percentage match of participants, first contributions (as a percent)	100.00%
Contributory employee saving plan, percentage of participants, first eligible compensation (as a percent)	3.00%
Contributory employee saving plan, percentage match of participants, second contributions (as a percent)	50.00%
Contributory employee saving plan, percentage of participants, second eligible compensation (as a percent)	2.00%
Defined contribution plan, annual retirement contributions (as a percent)	3.00%
Company contributions	$ 28.6	$ 27.2	$ 25.2