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Income Taxes - Details of Deferred Tax Assets and Liabilities (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Deferred tax assets:        
Foreign tax credits $ 4.5 $ 5.5    
Accrued expenses 3.4 4.6    
Stock options 5.2 5.5    
Excess of tax over book basis in property, plant and equipment 0.9 1.1    
Net operating loss carry forwards 0.3 0.3    
Pension liabilities 6.5 9.2    
Other intangible assets 1.0 0    
Other 3.9 4.7    
Valuation allowance 0 0 (7.5) (10.8)
Deferred tax liabilities:        
Goodwill amortization (7.2) (6.9)    
Other intangible assets (0.3) (0.9)    
Excess of book over tax basis in tax deductible goodwill (0.2) 0    
Excess of book over tax basis in intangible assets (7.5) 0    
Other (2.9) (3.2)    
Total net deferred tax asset 7.6 19.9    
Deferred taxes are included within the consolidated balance sheets as follows:        
Deferred tax assets 17.3 23.7    
Deferred tax liabilities (9.7) (3.8)    
Total net deferred tax asset 7.6 19.9    
Current portion of deferred tax assets 8.7 11.0    
Deferred tax assets, net of current portion 8.6 12.7    
Current portion of deferred tax liabilities (0.2) (0.2)    
Deferred tax liabilities, net of current portion (9.5) (3.6)    
Total net deferred tax asset $ 7.6 $ 19.9