Guarantor and Non-Guarantor Financial Information (Details) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
Net sales	$ 1,952.0	$ 1,323.8
Cost of products sold	1,223.3	845.1
Gross Profit	728.7	478.7
Selling, distribution, and administrative expenses and other special project costs	410.5	262.0
Amortization	53.0	24.9
Other operating (income) expense - net	(1.9)	0.2
Operating Income	267.1	191.6
Interest (expense) income - net	(44.4)	(17.4)
Other income (expense) - net	0.1	1.3
Equity in net earnings of subsidiaries	0.0	0.0
Income Before Income Taxes	222.8	175.5
Income taxes	86.4	59.5
Net Income	136.4	116.0
Other comprehensive (loss) income, net of tax	(21.1)	(5.3)
Comprehensive Income	115.3	110.7
Eliminations [Member]
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
Net sales	(1,341.0)	(1,191.5)
Cost of products sold	(1,340.6)	(1,182.1)
Gross Profit	(0.4)	(9.4)
Selling, distribution, and administrative expenses and other special project costs	0.0	0.0
Amortization	0.0	0.0
Other operating (income) expense - net	0.0	0.0
Operating Income	(0.4)	(9.4)
Interest (expense) income - net	0.0	0.0
Other income (expense) - net	0.0	0.0
Equity in net earnings of subsidiaries	(154.6)	(130.9)
Income Before Income Taxes	(155.0)	(140.3)
Income taxes	0.0	0.0
Net Income	(155.0)	(140.3)
Other comprehensive (loss) income, net of tax	22.0	11.0
Comprehensive Income	(133.0)	(129.3)
The J.M. Smucker Company (Parent) [Member]
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
Net sales	760.8	707.1
Cost of products sold	609.9	582.8
Gross Profit	150.9	124.3
Selling, distribution, and administrative expenses and other special project costs	62.2	52.8
Amortization	1.1	1.0
Other operating (income) expense - net	(0.1)	0.0
Operating Income	87.7	70.5
Interest (expense) income - net	(44.6)	(17.6)
Other income (expense) - net	2.9	1.3
Equity in net earnings of subsidiaries	106.4	77.5
Income Before Income Taxes	152.4	131.7
Income taxes	16.0	15.7
Net Income	136.4	116.0
Other comprehensive (loss) income, net of tax	(21.1)	(5.3)
Comprehensive Income	115.3	110.7
Subsidiary Guarantors [Member]
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
Net sales	298.2	290.4
Cost of products sold	272.2	263.2
Gross Profit	26.0	27.2
Selling, distribution, and administrative expenses and other special project costs	10.6	12.2
Amortization	0.0	0.0
Other operating (income) expense - net	0.4	0.4
Operating Income	15.0	14.6
Interest (expense) income - net	0.3	0.3
Other income (expense) - net	0.0	0.0
Equity in net earnings of subsidiaries	33.2	38.8
Income Before Income Taxes	48.5	53.7
Income taxes	0.1	0.1
Net Income	48.4	53.6
Other comprehensive (loss) income, net of tax	0.3	(4.0)
Comprehensive Income	48.7	49.6
Non-Guarantor Subsidiaries [Member]
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
Net sales	2,234.0	1,517.8
Cost of products sold	1,681.8	1,181.2
Gross Profit	552.2	336.6
Selling, distribution, and administrative expenses and other special project costs	337.7	197.0
Amortization	51.9	23.9
Other operating (income) expense - net	(2.2)	(0.2)
Operating Income	164.8	115.9
Interest (expense) income - net	(0.1)	(0.1)
Other income (expense) - net	(2.8)	0.0
Equity in net earnings of subsidiaries	15.0	14.6
Income Before Income Taxes	176.9	130.4
Income taxes	70.3	43.7
Net Income	106.6	86.7
Other comprehensive (loss) income, net of tax	(22.3)	(7.0)
Comprehensive Income	$ 84.3	$ 79.7