Income Taxes (Details 3) - USD ($) $ in Millions	Apr. 30, 2020	Apr. 30, 2019
Deferred tax liabilities:
Intangible assets	$ 1,399.7	$ 1,428.3
Property, plant, and equipment	151.3	120.5
Leases	30.3	0.0
Other	15.1	13.4
Total deferred tax liabilities	1,596.4	1,562.2
Deferred tax assets:
Post-employment and other employee benefits	100.3	84.9
Tax credit and loss carryforwards	28.1	10.0
Intangible assets	16.9	17.2
Hedging transactions	59.5	15.6
Leases	31.9	0.0
Other	37.8	39.4
Total deferred tax assets	274.5	167.1
Valuation allowance	(29.7)	(3.5)
Total deferred tax assets, less allowance	244.8	163.6
Net deferred tax liability	$ 1,351.6	$ 1,398.6