v3.26.1
Investments (Net Unrealized Gains Losses on Investments) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments $ (31,689) $ (26,645)
Fixed maturities | Available-for-sale | With an allowance    
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments (4) (4)
Fixed maturities | Available-for-sale | Without an allowance    
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments (32,142) (26,354)
Derivatives designated as cash flow hedges    
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments 536 (231)
Derivatives designated as fair value hedges    
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments (139) (123)
Other investments    
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments $ 60 $ 67