Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6.0	$ 8.1	$ 8.3
Interest cost	16.4	14.8	13.5
Expected return on assets	(26.5)	(26.2)	(26.4)
Prior service cost and transition amortization	0.6	0.3	0.6
Actuarial loss amortization	4.4	4.6	7.3
Settlement loss	2.9	3.5	0.0
Net periodic benefit costs	3.8	5.1	3.3
Other changes recognized in other comprehensive loss (income):
Net actuarial loss (gain)	29.0	(7.2)	(21.7)
Amortization of asset obligations	(0.2)	(0.2)	(0.2)
Amortization of prior service cost	(0.4)	(0.1)	(0.4)
Amortization of net actuarial loss	(7.3)	(8.1)	(7.3)
Total recognized in other comprehensive loss (income)	21.1	(15.6)	(29.6)
Total recognized in net periodic benefit costs and other comprehensive loss (income)	$ 24.9	$ (10.5)	$ (26.3)