v3.26.1
Derivatives and Hedge Accounting - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Credit derivatives:      
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other assets   Other assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other liabilities   Other liabilities
Reclassification into interest expense $ 7 $ 7  
Amounts to be reclassified in the next 30 years $ 111    
Maximum duration of hedging relationship 30 years    
Amounts to be reclassified in the next twelve months $ 28    
Amounts excluded from the assessment of hedge effectiveness that are recognized into earnings 0    
Foreign currency translation gain (loss) adjustment related to net investment hedge relationships (46) 182  
Currency Swap      
Credit derivatives:      
Foreign currency translation gain (loss) adjustment related to net investment hedge relationships 2 (4)  
Net Investment Income      
Credit derivatives:      
Foreign currency translation gain (loss) adjustment related to net investment hedge relationships 0 $ (14)  
Nonrelated Party      
Credit derivatives:      
Collateral posted 1,300   $ 1,200
Collateral obtained from third parties for derivative transactions $ 3,900   $ 4,000