Employee Benefit Plans (Components of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Net periodic pension costs
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Curtailment Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Pension Plan
Net periodic pension costs
Service cost	$ 6.9	$ 7.5	$ 9.5
Interest cost	10.6	10.2	13.5
Expected return on assets	(24.8)	(23.7)	(26.1)
Prior service cost amortization	0.2	0.3	0.7
Actuarial loss amortization	6.9	8.2	6.5
Settlement charge	3.0	2.0	3.1
Curtailment charge	0.0	0.8	0.0
Net periodic pension costs	2.8	5.3	7.2
Other changes recognized in other comprehensive income (loss):
Net actuarial (loss) gain	(1.3)	35.9	(25.2)
Amortization of asset obligations	0.0	0.0	0.2
Amortization of prior service cost	0.3	1.2	0.6
Amortization of net actuarial loss	9.9	10.2	9.5
Total recognized in other comprehensive income (loss)	8.9	47.3	(14.9)
Total recognized in net periodic pension costs and other comprehensive income (loss)	$ 6.1	$ 42.0	$ (22.1)