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Summary of Quarterly Results of Operations (Unaudited) - Narrative - Significant Items for Fiscal 2014 (Details) $ in Millions		3 Months Ended
	Feb. 10, 2014 USD ($) investment	May. 03, 2014 USD ($) investment
U.S. | Domestic tax authority
Segment Reporting Information [Line Items]
Valuation allowance, deferred tax asset		$ 31.7
Lumidigm
Segment Reporting Information [Line Items]
Number of investments | investment	1	1
Pre-tax gain on sale of investment	$ 3.2	$ 3.2
Power Products | Eetrex
Segment Reporting Information [Line Items]
Asset impairment charge		$ 1.7

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