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Income Taxes (Summary of Effective Income Tax Rate For Continuing Operations) (Details)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes [Abstract]      
Income tax expense at federal statutory rate 35.00% 35.00% 35.00%
Valuation allowance for capital loss carry-forwards 1.90% 0.90% 0.50%
State taxes, net of federal income tax benefit 1.10% 1.70% 0.90%
Unremitted earnings from foreign operations 0.60% 1.80% 1.30%
Non-deductible expenses 0.30% 0.80% 0.30%
Non-deductible acquisition expenses   3.50%  
Write-off of tax receivable from indemnification     1.80%
Research and development tax credit   (1.00%) (0.80%)
Deduction for divestiture of subsidiary stock   (15.30%)  
Valuation allowance for foreign operating loss carry-forwards (0.10%) 1.40% 1.30%
Reversal of income tax contingency accruals and tax settlements (0.50%) 0.30% 0.60%
Changes in estimates related to prior year tax provision (0.50%) (0.10%) (4.10%)
Domestic Production Activities Deduction (0.60%)   (1.10%)
Foreign rate differences (0.60%) (0.70%) (1.80%)
Tax incentive (7.00%) (1.80%)  
Other 0.20% (0.10%) (0.20%)
Effective income tax rate 29.80% 26.40% 33.70%