Discontinued Operations (Details) (USD $)	3 Months Ended		6 Months Ended
	Oct. 28, 2012	Oct. 26, 2011	Oct. 28, 2012	Oct. 26, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net after-tax losses	$ (678,000)	$ (268,000)	$ (22,004,000)	$ (883,000)
U.S. Foodservice Dessert Business [Member] [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax			(32,700,000)
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, after Income Tax			(21,100,000)
Sales	0	17,900,000	2,500,000	34,800,000
Net after-tax losses	0	(300,000)	(900,000)	(900,000)
Tax benefit on losses	$ 0	$ 100,000	$ 600,000	$ 500,000