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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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