Income Taxes (Details 2) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 30, 2018	Dec. 31, 2017	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2018
(Percent of Pre-tax Income)
Statutory federal income tax rate	21.00%	35.00%	21.00%	21.00%	30.40%
Tax reform – net impact on U.S. deferred tax assets and liabilities			0.00%	0.00%	(92.00%)
Tax reform – transition tax			0.00%	(0.50%)	3.00%
Goodwill impairment charges			0.00%	2.90%	5.50%
Sale of the U.S. baking business			0.00%	2.40%	0.00%
State and local income taxes			3.30%	2.70%	1.90%
Domestic manufacturing deduction			0.00%	0.00%	(3.00%)
Deferred tax benefit from integration			0.00%	(2.40%)	0.00%
Other items – net			(0.20%)	0.60%	(1.30%)
Effective income tax rate			24.10%	26.70%	(55.50%)
Income taxes paid			$ 227.1	$ 250.9	$ 336.8