Reportable Segments (Details 1) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Revenues, Assets, and Long-Lived Assets [Line Items]
Net sales	$ 8,002.7	$ 7,801.0	$ 7,838.0
Assets	16,284.2	16,970.4	16,711.3
Total long-lived assets (excluding goodwill and other intangible assets)	2,277.7	2,264.2	2,056.4
United States [Member]
Revenues, Assets, and Long-Lived Assets [Line Items]
Net sales	7,448.3	7,247.9	7,298.0
Assets	15,879.7	16,547.6	16,338.0
Long-lived assets	2,220.6	2,209.9	2,037.5
Total international [Member]
Revenues, Assets, and Long-Lived Assets [Line Items]
Net sales	554.4	553.1	540.0
Assets	404.5	422.8	373.3
Long-lived assets	57.1	54.3	18.9
Canada [Member]
Revenues, Assets, and Long-Lived Assets [Line Items]
Net sales	443.6	445.3	421.9
Assets	402.7	421.3	362.1
Long-lived assets	57.1	54.3	18.9
All other international [Member]
Revenues, Assets, and Long-Lived Assets [Line Items]
Net sales	110.8	107.8	118.1
Assets	1.8	1.5	11.2
Long-lived assets	$ 0.0	$ 0.0	$ 0.0