v3.26.1
Derivative Financial Instruments - Derivatives Not Designated as Hedging Instruments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Effect of derivatives not designated as hedging instruments on the consolidated statements of operations        
Amount of gain (loss) recognized in net income on derivatives $ (223.7) $ (323.1) $ (156.0) $ (651.0)
Interest rate contracts        
Effect of derivatives not designated as hedging instruments on the consolidated statements of operations        
Amount of gain (loss) recognized in net income on derivatives 7.8 (148.0) 2.8 (186.6)
Foreign exchange contracts        
Effect of derivatives not designated as hedging instruments on the consolidated statements of operations        
Amount of gain (loss) recognized in net income on derivatives (3.8) (5.0) 13.5 16.0
Equity contracts        
Effect of derivatives not designated as hedging instruments on the consolidated statements of operations        
Amount of gain (loss) recognized in net income on derivatives 637.3 162.6 478.7 22.3
Credit contracts        
Effect of derivatives not designated as hedging instruments on the consolidated statements of operations        
Amount of gain (loss) recognized in net income on derivatives 24.2 (12.1) 8.3 (28.1)
Other contracts        
Effect of derivatives not designated as hedging instruments on the consolidated statements of operations        
Amount of gain (loss) recognized in net income on derivatives $ (889.2) $ (320.6) $ (659.3) $ (474.6)