v3.8.0.1

Income Taxes Effective Income Tax Rate (Details) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Disclosure [Abstract] |  |  |
Statutory federal income tax rate | 35.00% | 35.00% | 35.00%
Increase (decrease) in tax rate resulting from: |  |  |
State income taxes (net of federal income tax benefit) | 0.70% | 1.70% | 1.80%
Foreign income taxed at lower rate than U.S. statutory rate | (5.00%) | (4.70%) | (4.60%)
Separation related adjustments for final resolution of uncertain tax positions | 0.00% | (1.90%) | 0.00%
Research and experimentation credits and federal domestic production deduction | (2.90%) | (2.50%) | (2.10%)
Other | (3.60%) | (0.50%) | 1.90%
Effective income tax rate prior to the impact of the TCJA | 24.20% | 27.10% | 32.00%
Deferred Tax Revaluation | (16.00%) | 0.00% | 0.00%
Transition Tax | 10.50% | 0.00% | 0.00%
Total provisional estimates related to the TCJA | (5.50%) | 0.00% | 0.00%
Estimated effective income tax rate including provisional estimates of the TCJA | 18.70% | 27.10% | 32.00%

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