Accounting Policies (Tables)

12 Months Ended

Apr. 30, 2020

Accounting Policies [Abstract]

Schedule of share-based payments

The following table summarizes amounts related to share-based payments.

	Year Ended April 30,
	2020		2019		2018
Share-based compensation expense included in SD&A	$	26.4	$	20.1	$	13.7
Share-based compensation expense (benefit) included in other special project costs	0.4		0.6		1.7
Total share-based compensation expense	$	26.8	$	20.7	$	15.4
Related income tax benefit	$	6.4	$	4.9	$	4.6