Employee Benefit Plans (Fair Value of Assets Held By U.S. Pension Plans) (Details) - Pension Plan - USD ($) $ in Millions	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	$ 550.6	$ 502.2	$ 486.3
U.S. Plan
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	370.3	344.5
Measured Using NAV Per Share as Practical Expedient	70.3	72.3
U.S. Plan | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	185.9	175.1
U.S. Plan | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	114.1	97.1
U.S. Plan | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Cash and cash equivalents
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	10.0	4.0
Measured Using NAV Per Share as Practical Expedient	0.0	0.0
U.S. Plan | Cash and cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	6.7	3.6
U.S. Plan | Cash and cash equivalents | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	3.3	0.4
U.S. Plan | Cash and cash equivalents | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Global equity securities
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	119.8	112.1
Measured Using NAV Per Share as Practical Expedient	40.5	35.8
U.S. Plan | Global equity securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	79.3	76.3
U.S. Plan | Global equity securities | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Global equity securities | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Fixed income securities
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	210.7	191.9
Measured Using NAV Per Share as Practical Expedient	0.0	0.0
U.S. Plan | Fixed income securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	99.9	95.2
U.S. Plan | Fixed income securities | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	110.8	96.7
U.S. Plan | Fixed income securities | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Private equity and other funds
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	26.8	33.1
Measured Using NAV Per Share as Practical Expedient	26.8	33.1
U.S. Plan | Private equity and other funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Private equity and other funds | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Private equity and other funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Real asset funds
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	3.0	3.4
Measured Using NAV Per Share as Practical Expedient	3.0	3.4
U.S. Plan | Real asset funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Real asset funds | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	0.0	0.0
U.S. Plan | Real asset funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure
Defined benefit plan, fair value of plan assets	$ 0.0	$ 0.0