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Income Taxes (Tables) | 9 Months Ended
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Sep. 30, 2018
Income Tax Disclosure [Abstract] |
Income Tax And Effective Tax Rate |
| Quarter ended |  | Year to date
| 2018 |  | 2017 |  | 2018 |  | 2017
Income tax provision | $ | 80 |  |  | $ | 106 |  |  | $ | 192 |  |  | $ | 278 |
Effective tax rate | 15.1 | % |  | 20.2 | % |  | 13.7 | % |  | 23.5 | %

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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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