Employee Benefit Plans (Summary of Pension Plans' Assets Valued At NAV) (Details) $ in Millions	12 Months Ended
	Jul. 31, 2016 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 223.5
Unfunded Commitments	4.9
International Assets
Defined Benefit Plan Disclosure [Line Items]
Fair Value	67.6
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 47.3
Fixed Income Securities | Minimum
Defined Benefit Plan Disclosure [Line Items]
Redemption Notice Period	60 days
Fixed Income Securities | Maximum
Defined Benefit Plan Disclosure [Line Items]
Redemption Notice Period	120 days
Fixed Income Securities | International Assets
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 35.8
Redemption Notice Period	7 days
Equity Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Unfunded Commitments	$ 0.0
Equity Fixed Income | International Assets
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 31.8
Redemption Notice Period	90 days
Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 13.8
Unfunded Commitments	$ 2.2
Redemption Notice Period	95 days
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 162.4
Unfunded Commitments	$ 2.7
Equity Securities | Minimum
Defined Benefit Plan Disclosure [Line Items]
Redemption Notice Period	10 days
Equity Securities | Maximum
Defined Benefit Plan Disclosure [Line Items]
Redemption Notice Period	100 days