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Equity Incentive Program - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award    
Share-based Payment Arrangement, Expense $ 3.5 $ 6.7
SSARs    
Share-based Compensation Arrangement by Share-based Payment Award    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount 0.0  
Stock Options    
Share-based Compensation Arrangement by Share-based Payment Award    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 8.6  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 2 years 2 months 12 days  
Restricted Stock Units (RSUs)    
Share-based Compensation Arrangement by Share-based Payment Award    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 32.1  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 2 years  
Performance Shares    
Share-based Compensation Arrangement by Share-based Payment Award    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 7.8  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 1 year 9 months 18 days  
Minimum | Performance Shares    
Share-based Compensation Arrangement by Share-based Payment Award    
Percentage increase of initial grant value 0.00%  
Maximum | Performance Shares    
Share-based Compensation Arrangement by Share-based Payment Award    
Percentage increase of initial grant value 225.00%