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Restructuring Activities (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Dec. 31, 2011
Restructuring charges $ 18.7 $ 0.3  
Restructuring reserve, current 19.9   13.1
Industrial Technologies [Member]
     
Restructuring charges 5.8 (1.1) [1]  
Restructuring reserve, adjustment     6.7
Restructuring reserve, current $ 5.4   $ 4.2
[1] Amount includes the reversal of $6.7 million of previously accrued restructuring charges.