Acquisitions (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2011 Year Acquisition	Sep. 30, 2010 Acquisition
Acquisitions (Textual) [Abstract]
Number of Businesses Acquired	4	5
Recognition of preliminary estimated aggregate goodwill	$ 154.4
Additional Acquisitions (Textual) [Abstract]
Fair value of the total consideration for acquisitions	263.3
Goodwill	154.4
Percentage of goodwill expected to be deductible for tax purposes	0.00%
Recognition of other intangible assets	57.0
Expected minimum amortization periods of finite lived other intangible assets	3
Expected maximum amortization periods of finite lived other intangible assets	15
Weighted average amortization period of finite lived intangible assets expected to be amortized	10
Energy and Safety Solutions [Member]
Acquisitions (Textual) [Abstract]
Number of Businesses Acquired	2	4
Recognition of preliminary estimated aggregate goodwill	38.0
Additional Acquisitions (Textual) [Abstract]
Goodwill	38.0
Electrical Products Group [Member]
Acquisitions (Textual) [Abstract]
Number of Businesses Acquired	2	1
Recognition of preliminary estimated aggregate goodwill	116.4
Additional Acquisitions (Textual) [Abstract]
Goodwill	$ 116.4

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Business acquisition purchase price allocation goodwill expected tax deductible percentage.

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The calculated weighted-average amortization period of a major class of finite-lived intangible assets acquired during the current period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

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The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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This element represents the acquisition-date fair value of the total consideration transferred which consists of the sum of the acquisition-date fair values of the assets transferred by the acquirer, the liabilities incurred by the acquirer to former owners of the acquiree, and the equity interests issued by the acquirer.

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The maximum useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.

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The number of businesses acquired by the entity during the period.

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