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Acquisitions (Narrative) (Details) (Ruud Lighting, Inc. [Member], USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended	12 Months Ended
	Aug. 17, 2011	Jun. 24, 2012	Jun. 24, 2012
Business Acquisition [Line Items]
Cash paid for acquisition	$ 372.2
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred		2.3
Business Combination, Consideration Transferred	666.0
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred	85.0
Business Combination, Proforma Information, Revenue of Acquiree since beginning of period			235.8
Business Combination, Acquisition Related Costs			3.1
Common Stock [Member]
Business Acquisition [Line Items]
Shares issued for acquisition	6.1
Fair value of common stock issued by the Company	$ 211.0