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Income Taxes Schedule of Effective Income Tax Rate Reconciliation (Details)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
U.S. federal statutory rate 35.00% 35.00% 35.00%
State income taxes, net of state credits and federal tax impact 2.90% 2.80% 2.90%
Impact of international operations (4.10%) (3.60%) (3.70%)
Non-deductible expenses 0.80% 0.50% 0.90%
Federal production incentives and credits (0.20%) (0.20%) (0.30%)
Other, net (0.50%) 0.20% (0.30%)
Effective tax rate (33.90%) 34.70% 34.50%