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Income Taxes (Effective Income Tax Reconciliation) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
U.S. federal corporate tax rate 35.00% 35.00% 35.00%
Income Tax Benefit Executive Retirement & Related Costs $ 4.0    
Tax on international operations less than U.S. tax rate (5.10%) (6.80%) (5.30%)
Reversal of prior valuation allowance 0.00% (0.50%) (1.00%)
Reversal of reserves for unrecognized tax benefits (1.60%) (0.50%) (0.80%)
U.S. tax on international earnings, net of foreign tax credits (4.60%) (0.10%) 0.10%
State income taxes, net of federal tax effect 0.30% 1.50% 0.10%
U.S. research and development credits (1.30%) (0.90%) (1.80%)
Other business credits and Section 199 Deduction (1.30%) (0.70%) (0.50%)
Other 1.20% 1.00% 1.60%
Effective tax rate 22.60% 28.00% 27.40%
Discrete tax charge, change in enacted tax rate $ 0.8   $ 1.3
Discrete tax benefit, R&D credit     1.3
Discrete tax charge, other adj   $ 1.0 $ 3.5
Income Tax Benefit Related to Pension Settlement $ 18.4    
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount   $ 0.8