Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Net periodic benefit costs:
Service cost	$ 1.5	$ 2.0
Interest cost	4.1	3.7
Expected return on assets	(6.6)	(6.5)
Prior service cost amortization	0.1	0.1
Actuarial loss amortization	1.1	1.1
Net periodic benefit costs	$ 0.2	$ 0.4