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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2019
Effective Income Tax Rate [Abstract]          
Effective income tax rate, continuing operations 23.70% 31.00% 16.50% 31.20%  
Forecast          
Expiration of the statute of limitations for the assessment of taxes         $ 4.0