Acquisitions and Divestitures - Fiscal 2013 Acquisitions (Details) (USD $) In Millions, unless otherwise specified						1 Months Ended
	May 03, 2014	Apr. 27, 2013	Jan. 26, 2013	Apr. 28, 2012	Apr. 30, 2011	Sep. 30, 2012 Hetronic South Europe S.R.L.	Sep. 30, 2012 Hetronic South Europe S.R.L. Customer relationships	Sep. 30, 2012 Hetronic South Europe S.R.L. Noncompete agreements
Business Acquisition [Line Items]
Cash paid for acquisition						$ 1.4
Acquiree's debt forgiveness						1.3
Total consideration transferred						2.7
Fair value of the tangible net assets						0.3
Fair value of intangible assets							1.6	0.1
Goodwill	$ 13.0	$ 12.9	$ 17.2	$ 16.4	$ 16.4	$ 0.8
Weighted average useful life of finite-lived intangible assets acquired							12 years	5 years