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Equity-Based Compensation Equity-Based Compensation - Income Tax Benefit (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Tax benefit from compensation expense $ 1.9 $ 1.5 $ 0.4