Reportable Segments (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Oct. 31, 2016		Oct. 31, 2015		Oct. 31, 2016	Oct. 31, 2015
Net sales:
Net sales		$ 1,913.9		$ 2,077.7		$ 3,729.7	$ 4,029.7
Segment profit:
Segment profit		471.6		478.3		918.5	924.4
Amortization		(51.8)		(53.0)		(103.5)	(106.0)
Interest expense – net		(41.0)		(42.6)		(82.5)	(87.0)
Unallocated derivative (losses) gains		(14.2)		6.0		(6.5)	(4.0)
Cost of products sold – special project costs (A)		(0.3)	[1]	(3.0)	[1]	(4.3)	(6.1)
Other special project costs (A)	[2]	(26.6)		(30.6)		(48.8)	(53.5)
Corporate administrative expenses		(75.4)		(83.9)		(158.3)	(173.9)
Other income (expense) – net		3.2		(1.6)		4.3	(1.5)
Income Before Income Taxes		265.5		269.6		518.9	492.4
U.S. Retail Coffee [Member]
Net sales:
Net sales		551.8		586.1		1,065.1	1,151.1
Segment profit:
Segment profit		186.5		180.4		360.3	354.2
U.S. Retail Consumer Foods [Member]
Net sales:
Net sales		557.3		644.0		1,094.3	1,226.2
Segment profit:
Segment profit		118.9		127.3		230.3	246.7
U.S. Retail Pet Foods [Member]
Net sales:
Net sales		531.0		566.7		1,050.5	1,116.6
Segment profit:
Segment profit		114.5		115.0		236.7	231.8
International and Foodservice [Member]
Net sales:
Net sales		273.8		280.9		519.8	535.8
Segment profit:
Segment profit		$ 51.7		$ 55.6		$ 91.2	$ 91.7

[1] Special project costs include merger and integration and restructuring costs. For more information, see Note 4: Integration and Restructuring Costs.

[2] Other special project costs include merger and integration and restructuring costs. For more information, see Note 4: Integration and Restructuring Costs.