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Stockholders' Equity - Textual (Details)
$ / shares in Units, $ in Millions
9 Months Ended 12 Months Ended 45 Months Ended
Dec. 31, 2017
USD ($)
shares
Dec. 31, 2021
USD ($)
numberOfVote
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Oct. 30, 2018
USD ($)
Aug. 01, 2017
USD ($)
Class of Stock [Line Items]                
Common Stock, shares authorized (in shares)   450,000,000.0 450,000,000.0     450,000,000.0    
Common Stock, par value per share (in dollars per share) | $ / shares   $ 0.01 $ 0.01     $ 0.01    
Number of vote per common stock | numberOfVote   1            
Preferred Stock, shares authorized (in shares)   100,000,000            
Preferred Stock, shares outstanding (in shares)   0            
Common Stock, shares outstanding (in shares)   133,300,000 97,800,000 96,900,000 110,400,000 97,800,000    
Stock repurchase program, authorized amount | $             $ 1,500.0 $ 500.0
Treasury stock, shares, acquired (in shares) 5,800,000     14,600,000 21,100,000 41,500,000    
Payments for repurchase of common stock | $ $ 175.7 $ 0.0 $ 0.0 $ 329.9 $ 834.7 $ 1,340.3    
Payments for commissions | $ $ 0.8              
Stock repurchase program, remaining authorized repurchase amount | $   $ 160.5            
Stock repurchased during period, shares   300,000 400,000 15,000,000.0        
Common Stock                
Class of Stock [Line Items]                
Common Stock, shares authorized (in shares)   450,000,000            
Common Stock, par value per share (in dollars per share) | $ / shares   $ 0.01            
Preferred Stock                
Class of Stock [Line Items]                
Preferred Stock, shares authorized (in shares)   100,000,000.0 100,000,000.0     100,000,000.0    
Preferred Stock, par value per share (in dollars per share) | $ / shares   $ 0.01 $ 0.01     $ 0.01    
Preferred Stock, shares outstanding (in shares)   0 0     0    
Series Common Stock                
Class of Stock [Line Items]                
Common Stock, shares authorized (in shares)   50,000,000 50,000,000.0     50,000,000.0    
Common Stock, par value per share (in dollars per share) | $ / shares   $ 0.01 $ 0.01     $ 0.01    
Common Stock, shares outstanding (in shares)   0 0     0    
Treasury Stock                
Class of Stock [Line Items]                
Shares relinquished, shares   300,000 400,000 400,000