Guarantor and Non-Guarantor Financial Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Condensed Statements of Consolidated Income and Comprehensive Income
Net sales	$ 1,559.9	$ 1,628.7	$ 2,910.8	$ 2,998.4
Cost of products sold	1,007.3	1,086.8	1,865.3	1,986.7
Gross Profit	552.6	541.9	1,045.5	1,011.7
Selling, distribution, and administrative expenses, restructuring, merger and integration, and other special project costs	277.2	268.7	533.2	524.8
Amortization	24.7	24.2	49.2	48.4
Other operating (income) expense - net	(0.1)	1.4	(1.0)	0.4
Operating Income	250.8	247.6	464.1	438.1
Interest (expense) income - net	(20.5)	(23.9)	(44.3)	(47.5)
Other income (expense) - net	(0.3)	0.5	(0.3)	0.9
Equity in net earnings of subsidiaries	0	0	0	0
Income Before Income Taxes	230.0	224.2	419.5	391.5
Income taxes	76.6	75.4	139.5	131.8
Net Income	153.4	148.8	280.0	259.7
Other comprehensive (loss) income, net of tax	(3.7)	4.2	(6.4)	3.8
Comprehensive Income	149.7	153.0	273.6	263.5
Eliminations [Member]
Condensed Statements of Consolidated Income and Comprehensive Income
Net sales	(1,525.4)	(1,101.8)	(2,807.3)	(2,062.0)
Cost of products sold	(1,518.1)	(1,102.2)	(2,795.8)	(2,059.7)
Gross Profit	(7.3)	0.4	(11.5)	(2.3)
Selling, distribution, and administrative expenses, restructuring, merger and integration, 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	(7.3)	0.4	(11.5)	(2.3)
Interest (expense) income - net	0	0	0	0
Other income (expense) - net	0	0	0	0
Equity in net earnings of subsidiaries	(153.5)	(168.2)	(284.4)	(307.2)
Income Before Income Taxes	(160.8)	(167.8)	(295.9)	(309.5)
Income taxes	0	0	0	0
Net Income	(160.8)	(167.8)	(295.9)	(309.5)
Other comprehensive (loss) income, net of tax	1.4	(1.4)	3.4	(1.2)
Comprehensive Income	(159.4)	(169.2)	(292.5)	(310.7)
The J.M. Smucker Company (Parent) [Member]
Condensed Statements of Consolidated Income and Comprehensive Income
Net sales	852.6	834.5	1,588.6	1,537.0
Cost of products sold	692.6	694.2	1,293.0	1,287.2
Gross Profit	160.0	140.3	295.6	249.8
Selling, distribution, and administrative expenses, restructuring, merger and integration, and other special project costs	55.4	59.1	104.0	116.0
Amortization	1.0	3.0	2.1	5.9
Other operating (income) expense - net	0.1	0	(1.4)	(0.7)
Operating Income	103.5	78.2	190.9	128.6
Interest (expense) income - net	(20.4)	(24.1)	(44.4)	(47.9)
Other income (expense) - net	0	5.0	0	9.5
Equity in net earnings of subsidiaries	95.5	109.8	178.1	199.1
Income Before Income Taxes	178.6	168.9	324.6	289.3
Income taxes	25.2	20.1	44.6	29.6
Net Income	153.4	148.8	280.0	259.7
Other comprehensive (loss) income, net of tax	(3.7)	4.2	(6.4)	3.8
Comprehensive Income	149.7	153.0	273.6	263.5
Subsidiary Guarantors [Member]
Condensed Statements of Consolidated Income and Comprehensive Income
Net sales	377.5	358.2	680.9	676.4
Cost of products sold	345.8	330.1	623.2	620.9
Gross Profit	31.7	28.1	57.7	55.5
Selling, distribution, and administrative expenses, restructuring, merger and integration, and other special project costs	12.4	10.8	23.3	22.7
Amortization	0	0	0	0
Other operating (income) expense - net	0.3	(0.8)	0.1	(1.3)
Operating Income	19.0	18.1	34.3	34.1
Interest (expense) income - net	0.3	0.3	0.6	0.6
Other income (expense) - net	(0.3)	0.2	(0.2)	0.7
Equity in net earnings of subsidiaries	39.3	40.2	72.2	73.4
Income Before Income Taxes	58.3	58.8	106.9	108.8
Income taxes	0.1	0.1	0.2	0.2
Net Income	58.2	58.7	106.7	108.6
Other comprehensive (loss) income, net of tax	3.2	(0.7)	5.1	1.6
Comprehensive Income	61.4	58.0	111.8	110.2
Non-Guarantor Subsidiaries [Member]
Condensed Statements of Consolidated Income and Comprehensive Income
Net sales	1,855.2	1,537.8	3,448.6	2,847.0
Cost of products sold	1,487.0	1,164.7	2,744.9	2,138.3
Gross Profit	368.2	373.1	703.7	708.7
Selling, distribution, and administrative expenses, restructuring, merger and integration, and other special project costs	209.4	198.8	405.9	386.1
Amortization	23.7	21.2	47.1	42.5
Other operating (income) expense - net	(0.5)	2.2	0.3	2.4
Operating Income	135.6	150.9	250.4	277.7
Interest (expense) income - net	(0.4)	(0.1)	(0.5)	(0.2)
Other income (expense) - net	0	(4.7)	(0.1)	(9.3)
Equity in net earnings of subsidiaries	18.7	18.2	34.1	34.7
Income Before Income Taxes	153.9	164.3	283.9	302.9
Income taxes	51.3	55.2	94.7	102.0
Net Income	102.6	109.1	189.2	200.9
Other comprehensive (loss) income, net of tax	(4.6)	2.1	(8.5)	(0.4)
Comprehensive Income	$ 98.0	$ 111.2	$ 180.7	$ 200.5