Business Acquisitions (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Business Acquisition [Line Items]
Tangible assets acquired	$ 62.5
Intangible assets	59.4
Goodwill	80.7
Net Deferred Tax Liabilities	(19.0)
Liabilities Assumed	(19.7)
Payments To Acquire Businesses Net Of Cash Acquired	163.9	96.5
Powerohm [Member]
Business Acquisition [Line Items]
Intangible assets	22.3
Goodwill	33.9
Payments To Acquire Businesses Net Of Cash Acquired	51.8
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	13.8
Payments To Acquire Businesses Net Of Cash Acquired	32.3
Finite-Lived Intangible Assets, Useful Life	22 years
Reuel [Member]
Business Acquisition [Line Items]
Intangible assets	5.7
Goodwill	2.7
Payments To Acquire Businesses Net Of Cash Acquired	11.5
Finite-Lived Intangible Assets, Useful Life	12 years
Litecontrol [Member]
Business Acquisition [Line Items]
Intangible assets	18.4
Goodwill	18.8
Payments To Acquire Businesses Net Of Cash Acquired	45.4
Finite-Lived Intangible Assets, Useful Life	13 years
RigPower [Member]
Business Acquisition [Line Items]
Intangible assets	3.5
Goodwill	8.5
Payments To Acquire Businesses Net Of Cash Acquired	$ 14.6
Finite-Lived Intangible Assets, Useful Life	10 years