Business Acquisitions (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition [Line Items]
Tangible assets acquired	$ 58.7
Intangible assets	56.0
Goodwill	69.9
Net Deferred Tax Liabilities	(17.8)
Liabilities Assumed	(19.5)
Payments To Acquire Businesses Net Of Cash Acquired	147.3	81.7
Powerohm [Member]
Business Acquisition [Line Items]
Intangible assets	22.3
Goodwill	33.8
Payments To Acquire Businesses Net Of Cash Acquired	51.7
Finite-Lived Intangible Assets, Useful Life	19 years
Fiber Cable [Member]
Business Acquisition [Line Items]
Intangible assets	4.3
Goodwill	3.0
Payments To Acquire Businesses Net Of Cash Acquired	8.3
Finite-Lived Intangible Assets, Useful Life	19 years
Pencell [Member]
Business Acquisition [Line Items]
Intangible assets	5.2
Goodwill	12.1
Payments To Acquire Businesses Net Of Cash Acquired	30.9
Finite-Lived Intangible Assets, Useful Life	22 years
Reuel [Member]
Business Acquisition [Line Items]
Intangible assets	5.8
Goodwill	2.7
Payments To Acquire Businesses Net Of Cash Acquired	11.5
Finite-Lived Intangible Assets, Useful Life	11 years
Litecontrol [Member]
Business Acquisition [Line Items]
Intangible assets	18.4
Goodwill	18.3
Payments To Acquire Businesses Net Of Cash Acquired	$ 44.9
Finite-Lived Intangible Assets, Useful Life	13 years