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Equity Incentive Program - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award        
Share-based Payment Arrangement, Expense $ 4,100,000 $ 7,300,000 $ 7,600,000 $ 14,000,000.0
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 6,600,000   $ 6,600,000  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition     2 years  
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award        
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount 23,900,000   $ 23,900,000  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition     1 year 10 months 24 days  
Performance Shares        
Share-based Compensation Arrangement by Share-based Payment Award        
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 3,700,000   $ 3,700,000  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition     1 year 7 months 6 days  
Minimum [Member] | Performance Shares        
Share-based Compensation Arrangement by Share-based Payment Award        
Percentage increase of initial grant value     0.00%  
Maximum [Member] | Performance Shares        
Share-based Compensation Arrangement by Share-based Payment Award        
Percentage increase of initial grant value     225.00%