Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Net periodic benefit cost:
Service cost	$ 2.0	$ 4.5	$ 4.1	$ 9.1
Interest cost	3.4	4.8	6.7	9.5
Expected return on assets	(6.6)	(7.2)	(13.2)	(14.5)
Prior service cost amortization	0.2	0.1	0.4	0.3
Actuarial loss amortization	1.8	2.1	3.6	4.3
Net periodic benefit cost	$ 0.8	$ 4.3	$ 1.6	$ 8.7