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Share-Based and Other Compensation - Annual Time-Based RSU Grants (Details)
$ / shares in Units, $ in Millions
1 Months Ended 2 Months Ended
Jan. 31, 2020
property
$ / shares
Feb. 01, 2019
USD ($)
property
$ / shares
Dec. 27, 2018
USD ($)
$ / shares
Feb. 14, 2018
$ / shares
shares
Jan. 29, 2018
$ / shares
shares
Jan. 31, 2020
USD ($)
$ / shares
Feb. 28, 2018
USD ($)
property
participant
Dec. 31, 2020
shares
Dec. 31, 2018
Time-Based Restricted Stock Units (RSUs), 2020 Time-Based RSU Grant [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of equal annual vesting installments | property 3                
Fair value RSUs granted | $           $ 9.0      
Fair value per share (in dollars per share) | $ / shares $ 82.57         $ 82.57      
Time-Based Restricted Stock Units (RSUs), 2019 Time-Based RSU Grant [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of equal annual vesting installments | property   3              
Fair value RSUs granted | $   $ 10.1              
Fair value per share (in dollars per share) | $ / shares   $ 69.89              
December 2018 Time-Based RSU Grant [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting criteria, one (percent)                 50.00%
Vesting criteria, two (percent)                 50.00%
Fair value RSUs granted | $     $ 18.5            
Fair value per share (in dollars per share) | $ / shares     $ 62.00            
Time-Based Restricted Stock Units (RSUs), 2018 Time-Based RSU Grant [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of equal annual vesting installments | property             3    
Number of participants with shorter service period | participant             1    
Fair value RSUs granted | $             $ 8.4    
Fair value per share (in dollars per share) | $ / shares       $ 66.46 $ 70.37        
RSUs granted (in units) | shares       67,818 56,015        
Time-Based Restricted Stock Units (RSUs) with Accelerated Vesting due to Separation of Employment [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
RSUs (in shares) | shares               54,735