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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Income Tax Disclosure [Abstract]        
Effective tax rate 25.60% 26.80% 24.40% 24.80%
Cash income taxes paid     $ 4.2  
Cash income tax refunds       $ 3.4