Income Taxes (Details 3) - USD ($) $ in Millions	Apr. 30, 2021	Apr. 30, 2020
Deferred tax liabilities:
Intangible assets	$ 1,347.4	$ 1,399.7
Property, plant, and equipment	187.9	151.3
Leases	27.4	30.3
Other	16.2	15.1
Total deferred tax liabilities	1,578.9	1,596.4
Deferred tax assets:
Post-employment and other employee benefits	103.6	100.3
Tax credit and loss carryforwards	28.3	28.1
Intangible assets	17.1	16.9
Hedging transactions	43.4	59.5
Leases	29.4	31.9
Other	38.5	37.8
Total deferred tax assets	260.3	274.5
Valuation allowance	(30.7)	(29.7)
Total deferred tax assets, less allowance	229.6	244.8
Net deferred tax liability	$ 1,349.3	$ 1,351.6