Condensed Statements of Consolidated Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2023	Jul. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 183.6	$ 109.8
Other comprehensive income (loss):
Foreign currency translation adjustments	7.4	1.4
Cash flow hedging derivative activity, net of tax	2.6	2.5
Pension and other postretirement benefit plans activity, net of tax	0.4	0.4
Available-for-sale securities activity, net of tax	(0.2)	(0.3)
Total Other Comprehensive Income	10.2	4.0
Comprehensive Income	$ 193.8	$ 113.8