Reportable Segments (Details 2) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Product category information [Line Items]
Net sales		$ 2,076.7	$ 1,972.3	$ 6,082.5	$ 5,709.0
Percent of product sales attributable to primary reportable segment				75.00%
U.S. Retail Coffee [Member]
Product category information [Line Items]
Net sales		625.9	558.8	$ 1,791.5	1,567.9
U.S. Retail Coffee [Member] | Coffee [Member]
Product category information [Line Items]
Net sales	[1]	693.7	650.7	1,989.0	1,824.5
U.S. Retail Pet Foods [Member]
Product category information [Line Items]
Net sales		768.6	721.9	2,169.9	2,101.7
U.S. Retail Pet Foods [Member] | Dog food [Member]
Product category information [Line Items]
Net sales	[1]	296.5	300.8	852.0	899.0
U.S. Retail Pet Foods [Member] | Cat food [Member]
Product category information [Line Items]
Net sales	[1]	245.2	223.9	697.1	633.6
U.S. Retail Pet Foods [Member] | Pet snacks [Member]
Product category information [Line Items]
Net sales	[1]	246.6	214.6	676.1	617.8
U.S. Retail Consumer Foods [Member]
Product category information [Line Items]
Net sales		447.6	422.9	1,415.9	1,251.2
U.S. Retail Consumer Foods [Member] | Peanut butter [Member]
Product category information [Line Items]
Net sales	[1]	208.5	180.0	601.2	533.3
U.S. Retail Consumer Foods [Member] | Frozen handheld [Member]
Product category information [Line Items]
Net sales	[1]	100.0	82.6	301.8	247.5
U.S. Retail Consumer Foods [Member] | Fruit spreads [Member]
Product category information [Line Items]
Net sales	[1]	99.8	88.3	293.3	264.0
U.S. Retail Consumer Foods [Member] | Shortening and oils [Member]
Product category information [Line Items]
Net sales	[1]	33.9	68.9	193.9	192.2
U.S. Retail Consumer Foods [Member] | Juices and beverages [Member]
Product category information [Line Items]
Net sales	[1]	33.5	30.4	103.8	94.0
Other
Product category information [Line Items]
Net sales		234.6	268.7	705.2	788.2
Other | Portion control [Member]
Product category information [Line Items]
Net sales	[1],[2]	27.9	42.0	83.0	123.9
Other | Baking mixes and ingredients [Member]
Product category information [Line Items]
Net sales	[1],[2]	21.5	19.6	74.7	59.3
Other | Other [Member]
Product category information [Line Items]
Net sales	[1],[2]	$ 69.6	$ 70.5	$ 216.6	$ 219.9

[1] The identified primary reportable segment generally represents at least 75 percent of total net sales for each respective product category.

[2] Represents the combined International and Away From Home operating segments.