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Stockholders' Equity - Repurchase of Common Stock (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Aug. 02, 2021
May 31, 2018
Mar. 31, 2017
Jul. 31, 2015
Equity, Class of Treasury Stock [Line Items]                
Stock repurchase program, authorized amount         $ 1,000.0   $ 1,500.0 $ 1,500.0
Stock repurchase program, remaining authorizations $ 646.3   $ 646.3          
Number of shares repurchased (in shares) 871,001 2,133,020 3,913,697 6,058,054        
Value of shares repurchased $ 50.1 $ 122.4 $ 250.1 $ 297.8        
Shares acquired, average price per share (in usd per share) $ 57.50 $ 57.36 $ 63.90 $ 49.16        
Common Stock                
Equity, Class of Treasury Stock [Line Items]                
Number of shares repurchased (in shares)       35,100        
Value of shares repurchased       $ 1.6        
New Share Repurchase Program                
Equity, Class of Treasury Stock [Line Items]                
Stock repurchase program, authorized amount           $ 1,000.0