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Share-based Compensation and Equity - Incentive Plans (Details) - shares
1 Months Ended 12 Months Ended 79 Months Ended
Jun. 13, 2013
Dec. 31, 2016
Sep. 30, 2015
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Aug. 31, 2007
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Options granted in the period (in shares)       0 698,000 717,000      
Stock options, net of estimated forfeitures                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period       1 month 6 days          
Stock options, net of estimated forfeitures | Tranche One                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award requisite service period       5 years          
Stock options, net of estimated forfeitures | Tranche Two                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award requisite service period         3 years        
2007 Stock Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Awards granted (in shares)               0  
2007 Stock Incentive Plan | Stock options, net of estimated forfeitures                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares authorized for issuance (in shares)                 9,232,000
Expiration period             10 years    
2013 Long-Term Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares available for grant (in shares) 7,521,000                
Number of additional shares authorized (in shares)   3,884,000 1,219,000            
Options granted in the period (in shares)       0 698,000 690,000      
2013 Long-Term Incentive Plan | Stock Options, Stock Appreciation Rights, And Restricted Stock Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Accelerated vesting, change in ownership percentage 50.00%                
Change In ownership, percentage of gross fair value of assets sold in 12 months period         80.00%        
2013 Long-Term Incentive Plan | Stock Options, Stock Appreciation Rights, And Restricted Stock Units | Wengen                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Accelerated vesting, change in ownership percentage 50.00%                
2013 Long-Term Incentive Plan | Performance Shares                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award catch up period 8 years                
2013 Long-Term Incentive Plan | Performance Shares | Tranche One                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period 3 years                
2013 Long-Term Incentive Plan | Performance Shares | Tranche Two                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period 3 years                
2013 Long-Term Incentive Plan | Performance Shares | Tranche Three                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period 3 years                
2013 Long-Term Incentive Plan | Stock options, net of estimated forfeitures                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Expiration period 10 years                
2013 Long-Term Incentive Plan | Stock options, net of estimated forfeitures | Minimum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period 3 years                
2013 Long-Term Incentive Plan | Stock options, net of estimated forfeitures | Maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period 5 years                
2013 Long-Term Incentive Plan - Available Under the 2013 Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares available for grant (in shares) 7,074,000                
2013 Long-Term Incentive Plan - Available Under the 2007 Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares available for grant (in shares) 447,000