XML 67 R57.htm IDEA: XBRL DOCUMENT v3.22.1
Stock Compensation - RSU and PSU Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Stock Compensation Plans    
Stock compensation expense $ 43.8 $ 47.3
Restricted Stock Units (RSUs)    
Stock Compensation Plans    
Number of shares awarded for each RSU (in shares) 1  
Percentage of units vesting at the end of each calendar year (as a percent) 25.00%  
Vesting period 4 years  
Performance Stock Units (PSUs)    
Stock Compensation Plans    
Stock compensation expense $ 1.8 $ 2.6
Performance Stock Units (PSUs) | Minimum    
Stock Compensation Plans    
Vesting period 3 years  
Performance Stock Units (PSUs) | Maximum    
Stock Compensation Plans    
Vesting period 4 years