Acquisitions (Cost of Acquired Entity) (Details) (Ruud Lighting, Inc. [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		1 Months Ended
	Jun. 24, 2012	Sep. 25, 2011	Sep. 25, 2011	Aug. 17, 2011	Aug. 17, 2011 Common Stock [Member]
Business Acquisition, Cost of Acquired Entity [Abstract]
Shares issued for acquisition					6.1
Fair value of common stock issued by the Company					$ 211.0
Cash consideration paid to acquired company's stockholders				372.2
Fair value of debt paid on behalf of acquired company's stockholders				85.0
Business Acquisition, Working Capital Adjustment	2.3
Total Purchase Price				666.0
Business Combination, Acquisition Related Costs		$ 3.1	$ 3.6