Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Net periodic benefit cost:
Service cost	$ 2.1	$ 4.6
Interest cost	3.4	4.8
Expected return on assets	(6.6)	(7.3)
Prior service cost and transition amortization	0.1	0.1
Actuarial loss amortization	1.8	2.1
Net periodic benefit cost	$ 0.8	$ 4.3