Employee Benefit Plans (Changes in Fair Value of U.S. Pension Plans' Level 3 Assets) (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Change in fair value of plan assets:
Fair value of plan assets, beginning of fiscal year	$ 502.2	$ 486.3
Unrealized gains (losses)	(166.1)	(152.0)
Foreign currency exchange	12.1	(11.2)
Fair value of plan assets, end of fiscal year	550.6	502.2	$ 486.3
Non - U.S. Plan
Change in fair value of plan assets:
Fair value of plan assets, beginning of fiscal year	157.7
Fair value of plan assets, end of fiscal year	180.3	157.7
Non - U.S. Plan | Significant Unobservable Inputs (Level 3)
Change in fair value of plan assets:
Fair value of plan assets, beginning of fiscal year	30.8	28.6	34.3
Unrealized gains (losses)	4.1	3.5	(4.0)
Foreign currency exchange	2.1	(1.5)	0.2
Purchases	0.5	0.5	0.5
Sales	(2.1)	(0.3)	(2.4)
Fair value of plan assets, end of fiscal year	$ 35.4	$ 30.8	$ 28.6