v3.26.1
Derivatives and Hedge Accounting - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 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 $ 14 $ 14  
Amounts to be reclassified in the next 30 years     $ 104    
Maximum duration of hedging relationship     30 years    
Amounts to be reclassified in the next twelve months     $ 28    
Foreign currency translation gain (loss) adjustment related to net investment hedge relationships (99) 64 (145) 246  
Currency Swap          
Credit derivatives:          
Foreign currency translation gain (loss) adjustment related to net investment hedge relationships 1 (5) 3 (9)  
Income Statement Location [Axis]: us-gaap:NetInvestmentIncome          
Credit derivatives:          
Foreign currency translation gain (loss) adjustment related to net investment hedge relationships 2 $ (14) 2 $ (28)  
Nonrelated Party          
Credit derivatives:          
Collateral posted 1,600   1,600   $ 1,200
Collateral obtained from third parties for derivative transactions $ 5,400   $ 5,400   $ 4,000