Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Net periodic benefit costs:
Service cost	$ 1.6	$ 1.5
Interest cost	3.4	4.1
Expected return on assets	(6.5)	(6.6)
Prior service cost amortization	0.2	0.1
Actuarial loss amortization	1.6	1.1
Net periodic benefit costs	$ 0.3	$ 0.2