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Income Taxes (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
Income Tax Disclosure [Abstract] |
Income Tax And Effective Tax Rate |
| Quarter ended
| 2018 |  | 2017
Income tax provision | $ | 76 |  |  | $ | 67 |
Effective tax rate | 15.0 | % |  | 19.4 | %

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- Definition Disclosure of income tax expense (benefit) and effective tax rate for the period. + References No definition available. + Details
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