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Debt (Details Textual)
$ in Millions
12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Debt Instrument [Line Items]      
Line of credit maximum capacity $ 4,000.0 $ 4,000.0  
Fees to maintain credit lines 14.2 20.2  
Interest paid $ 8,200.0 6,400.0 $ 2,200.0
Minimum      
Debt Instrument [Line Items]      
Common equity tier one ratio 4.5    
Maximum      
Debt Instrument [Line Items]      
Common equity tier one ratio 6.5    
Short-term Debt      
Debt Instrument [Line Items]      
Fees to maintain credit lines $ 11.9 12.0  
Lending Trust      
Debt Instrument [Line Items]      
Debt term 3 years    
Line of credit maximum capacity $ 3,000.0    
Subsidiaries      
Debt Instrument [Line Items]      
Line of credit maximum capacity 191.0 185.0  
Amount drawn from committed lines 16.0 0.0  
Charge Trust      
Debt Instrument [Line Items]      
Line of credit maximum capacity $ 3,000.0    
Debt instrument, term 3 years    
Specified date face amount of eligible notes issued Jul. 15, 2026    
Amount drawn from committed lines $ 0.0 $ 0.0