XML 63 R52.htm IDEA: XBRL DOCUMENT v3.21.1
Investments (Net Unrealized Gains Losses on Investments) (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments $ 37,449 $ 58,417
Fixed maturities | Available-for-sale | With an allowance    
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments (5) (25)
Fixed maturities | Available-for-sale | Without an allowance    
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments 37,610 58,593
Derivatives designated as cash flow hedges    
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments (159) (168)
Derivatives designated as fair value hedges    
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments 12 10
Other investments    
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments (9) $ 7
Other investments | Held-to-maturity    
Gain (Loss) on Securities [Line Items]    
Net unrealized gains (losses) on investments $ 0