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Equity - Share Repurchases (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Jun. 30, 2019
Feb. 28, 2020
Dec. 31, 2018
Dec. 31, 2017
Equity, Class of Treasury Stock [Line Items]            
Common stock amount authorized to be repurchased       $ 500,000,000.0    
Shares repurchased (in shares) 0          
Payments for repurchase of common stock   $ 32,400,000 $ 3,300,000      
Amount remained unused under repurchase program $ 467,600,000 $ 467,600,000        
Common Stock            
Equity, Class of Treasury Stock [Line Items]            
Common stock amount authorized to be repurchased         $ 350,000,000.0 $ 100,000,000.0