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Income Taxes (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Jun. 30, 2011
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Tax [Line Items]          
Deferred tax expense (benefit) corrections recorded in current period relating to prior periods $ (2.2) $ 1.7      
Net operating loss carryforwards expiry period     2030    
Net operating loss carryforwards subject to expiration 66.7   66.7    
Undistributed earnings of foreign subsidiaries 168.8   168.8 142.2 101.4
Valuation allowance 32.3   32.3 36.6 36.1
Gross deferred tax assets 125.9   125.9 112.9 114.0
Valuation allowance increase (decrease)     (4.3) 0.5  
Uncertain tax positions 3.1   3.1    
Tax positions that could significantly change total amounts in next twelve months 1.6   1.6    
Recognized tax (benefit) expense related to interest and penalties for uncertain tax positions     (0.5) (0.9) 0.5
Accrued interest and penalties 1.3   1.3 2.1 3.0
Accrued unrecognized tax benefits         8.5
Uncertain taxes reclassified       4.0  
Audits settled during the year       2005 through 2007  
Reclassification of current taxes payable and deferred taxes       4.5  
Operating loss carryforwards, limitations on use    

At December 31, 2011 and 2010, several of the Company's subsidiaries had unused net operating loss carryforwards and tax credit carryforwards arising from periods prior to the Company's ownership which expire through 2030. The Internal Revenue Code limits the timing and manner in which the Company may use any acquired net operating losses or tax credits.

   
Federal income tax benefit relating to settlement     0.1    
Internal Revenue Service (IRS) [Member]
          
Income Tax [Line Items]          
Net operating loss carryforwards 61.3   61.3    
Year through which tax returns are no longer subject to audit     2007    
Operating Loss Carryforwards, Expiration Dates     2030    
Foreign Country [Member]
          
Income Tax [Line Items]          
Net operating loss carryforwards 73.1   73.1    
Net operating loss carryforwards with an indefinite carry forward period 6.3   6.3    
Year through which tax returns are no longer subject to audit     2005    
Operating Loss Carryforwards, Expiration Dates     2020    
State and Local Jurisdiction [Member]
          
Income Tax [Line Items]          
Net operating loss carryforwards $ 31.7   $ 31.7    
Year through which tax returns are no longer subject to audit     2004    
Operating Loss Carryforwards, Expiration Dates     2030