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Share Repurchases - Additional Information (Details) - USD ($)
$ in Millions
1 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2021
Feb. 28, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Oct. 28, 2021
Accelerated Share Repurchases [Line Items]            
Stock repurchase program, authorized amount           $ 1,000.0
Payment for share repurchase     $ 0.0 $ 54.9    
Commercial Bank            
Accelerated Share Repurchases [Line Items]            
Stock repurchase program, authorized amount $ 180.0       $ 180.0  
Accelerated share repurchases, settlement payment $ 200.0       $ 200.0  
Accelerated share repurchases received 1,800,000 200,000        
Evergreen Program            
Accelerated Share Repurchases [Line Items]            
Payment for share repurchase $ 100.0          
Share Repurchase Program            
Accelerated Share Repurchases [Line Items]            
Open market share repurchase 1,800,000          
Open market share repurchase amount $ 170.3          
Accelerated share repurchases received         2,000,000.0  
Stock repurchased during period, shares     729,700,000      
Payment for share repurchase $ 70.3