Employee Benefit Plans (Fair Value Of Assets Held By U.S. Pension Plans) (Details) - Pension Plan - USD ($) $ in Millions	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	$ 486.3	$ 465.1	$ 455.5
U.S. Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	330.9	304.0
Defined benefit plan, alternative investments, fair value of plan assets	90.0	120.2
U.S. Plan | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	159.6	97.6
U.S. Plan | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	81.3	86.2
U.S. Plan | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	5.0	5.5
Defined benefit plan, alternative investments, fair value of plan assets	0.0	0.0
U.S. Plan | Cash and cash equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	4.7	1.8
U.S. Plan | Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0.3	3.7
U.S. Plan | Cash and cash equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Global equity securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	113.4	110.8
Defined benefit plan, alternative investments, fair value of plan assets	31.0	49.9
U.S. Plan | Global equity securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	82.4	60.9
U.S. Plan | Global equity securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Global equity securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Private equity and other funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	153.5	117.4
Defined benefit plan, alternative investments, fair value of plan assets	0.0	0.0
U.S. Plan | Private equity and other funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	72.5	34.9
U.S. Plan | Private equity and other funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	81.0	82.5
U.S. Plan | Private equity and other funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Private equity and other funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	53.7	65.0
Defined benefit plan, alternative investments, fair value of plan assets	53.7	65.0
U.S. Plan | Private equity and other funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Private equity and other funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Private equity and other funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Real asset funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	5.3	5.3
Defined benefit plan, alternative investments, fair value of plan assets	5.3	5.3
U.S. Plan | Real asset funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Real asset funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Real asset funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	$ 0.0	$ 0.0