v3.26.1
Financial Derivatives (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative [Line Items]    
Cash and securities held to collateralize net derivative assets $ 2,000  
Cash and securities pledged to collateralize net derivative liabilities 2,100  
Gain (loss) on net investment hedge derivatives 27 $ (41)
Cash flow hedges | Interest rate contracts    
Derivative [Line Items]    
Cash flow hedge loss to be reclassified within twelve months 71  
Cash flow hedge loss to be reclassified within twelve months, net of tax $ 55  
Maximum length of time hedged in cash flow hedge 10 years