v3.26.3
Derivatives and Hedge Accounting - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Credit derivatives:          
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other assets   Other assets   Other assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other liabilities   Other liabilities   Other liabilities
Reclassification into interest expense $ 7 $ 7 $ 21 $ 21  
Amounts to be reclassified in the next 30 years     $ 97    
Maximum duration of hedging relationship     30 years    
Amounts to be reclassified in the next twelve months     $ 18    
Foreign currency translation gain (loss) adjustment related to net investment hedge relationships (431) 13 (576) 259  
Currency Swap          
Credit derivatives:          
Foreign currency translation gain (loss) adjustment related to net investment hedge relationships 0 0 3 (9)  
Income Statement Location [Axis]: us-gaap:NetInvestmentIncome          
Credit derivatives:          
Foreign currency translation gain (loss) adjustment related to net investment hedge relationships 0 $ (15) 2 $ (43)  
Nonrelated Party          
Credit derivatives:          
Collateral posted 1,900   1,900   $ 1,200
Collateral obtained from third parties for derivative transactions $ 6,000   $ 6,000   $ 4,000