Goodwill and Intangible (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Goodwill Roll Forward
Goodwill, Beginning Balance	$ 755.5
Goodwill Acquired	19.3
Translation adjustments	(2.4)
Goodwill, Ending Balance	772.4
Payments To Acquire Businesses Net Of Cash Acquired	37.5	10.9
Other Intangible Assets [Line Items]
Gross Amount Finite Intangible	326.0		315.5
Gross Amount Indefinite Lived Intangible	56.3		56.4
Total Gross Other Intangible Assets	382.3		371.9
Accumulated Amortization Intangible	(88.3)		(83.8)
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Year to date amortization expense	4.9	4.2
Future Amortization Expense, Remainder of Fiscal Year	14.4
Future Amort Yr1	18.6
Future Amort Yr2	17.0
Future Amort Yr3	16.4
Future Amort Yr4	15.0
Future Amort Yr5	13.6
Tradenames Other [Member]
Other Intangible Assets [Line Items]
Gross Amount Indefinite Lived Intangible	56.3		56.4
Patents Tradenames Trademarks [Member]
Other Intangible Assets [Line Items]
Gross Amount Finite Intangible	106.7		102.8
Accumulated Amortization Intangible	(24.2)		(23.0)
Customer Relationships [Member]
Other Intangible Assets [Line Items]
Gross Amount Finite Intangible	219.3		212.7
Accumulated Amortization Intangible	(64.1)		(60.8)
Electrical [Member]
Goodwill Roll Forward
Goodwill, Beginning Balance	474.6
Goodwill Acquired	19.3
Translation adjustments	(2.7)
Goodwill, Ending Balance	491.2
Power [Member]
Goodwill Roll Forward
Goodwill, Beginning Balance	280.9
Goodwill Acquired	0
Translation adjustments	0.3
Goodwill, Ending Balance	$ 281.2