Income from Continued Dumping and Subsidy Offset Act (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Apr. 28, 2012	Apr. 28, 2012
Income from Continued Dumping and Subsidy Offset Act [Abstract]
Income from Continued Dumping and Subsidy Offset Act, net		$ 11.1
Income from Discontinued Dumping and Subsidy Offset Act, net		6.9
Previously withheld distributions received from continued operations	10.0
Previously withheld distributions received from discontinued operations	$ 6.3