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Intangible Assets and Goodwill - Goodwill Rollforward (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended							12 Months Ended				12 Months Ended
	Apr. 27, 2013	May 03, 2014	Apr. 27, 2013	Apr. 28, 2012	May 03, 2014 Interconnect	Apr. 27, 2013 Interconnect	Apr. 28, 2012 Interconnect	Jan. 26, 2013 Interconnect	May 03, 2014 Power Products	Apr. 27, 2013 Power Products	Apr. 28, 2012 Power Products	Jan. 26, 2013 Power Products	Apr. 27, 2013 Hetronic Italy	Sep. 30, 2012 Hetronic Italy
Goodwill [Roll Forward]
Beginning balance	$ 17.2	$ 12.9	$ 16.4	$ 16.4	$ 11.9	$ 11.1	$ 11.1	$ 12.0	$ 1.0	$ 5.3	$ 5.3	$ 5.2		$ 0.8
Impairment	(4.3)	(1.7)	(4.3)	0		0				(4.3)
Attributable to acquisitions			0.8	0		0.8	0			0	0		0.8
Foreign currency translation		0.1	0		0.1	0			0	0
Ending balance	$ 12.9	$ 13.0	$ 12.9	$ 16.4	$ 12.0	$ 11.9	$ 11.1	$ 12.0	$ 1.0	$ 1.0	$ 5.3	$ 5.2		$ 0.8

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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