v3.26.1
Investments (Allowance for Credit Losses) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance, beginning of period $ 487 $ 632 $ 469 $ 574
Addition to (release of) allowance for expected losses 17 71 34 129
Write-downs charged against the allowance 0 (150) 0 (150)
Other 1 1 2 1
Allowance, end of period 505 554 505 554
Commercial Mortgage Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance, beginning of period 350 460 366 407
Addition to (release of) allowance for expected losses 30 (11) 13 42
Write-downs charged against the allowance 0 0 0 0
Other 1 1 2 1
Allowance, end of period 381 450 381 450
Agricultural Property Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance, beginning of period 59 123 48 121
Addition to (release of) allowance for expected losses (17) 85 (6) 87
Write-downs charged against the allowance 0 (150) 0 (150)
Other 0 0 0 0
Allowance, end of period 42 58 42 58
Residential Mortgage Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance, beginning of period 22 0 15 0
Addition to (release of) allowance for expected losses 6 0 13 0
Write-downs charged against the allowance 0 0 0 0
Other 0 0 0 0
Allowance, end of period 28 0 28 0
Other Collateralized Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance, beginning of period 31 34 40 32
Addition to (release of) allowance for expected losses (2) (2) (11) 0
Write-downs charged against the allowance 0 0 0 0
Other 0 0 0 0
Allowance, end of period 29 32 29 32
Uncollateralized Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance, beginning of period 25 15 0 14
Addition to (release of) allowance for expected losses 0 (1) 25 0
Write-downs charged against the allowance 0 0 0 0
Other 0 0 0 0
Allowance, end of period $ 25 $ 14 $ 25 $ 14