v3.25.2
Equity (Reclassifications out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Realized investment gains (losses), net $ (1,699) [1] $ (166) [1] $ (2,429) [2] $ (474) [1]
Amortization of defined benefit items:        
Other Income [1] 1,412 591 1,692 1,929
Total foreign currency translation adjustment        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Amounts reclassified from AOCI     (20) (20)
Total net unrealized investment gains (losses)        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Amounts reclassified from AOCI     511 467
Total amortization of defined benefit items        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Amounts reclassified from AOCI     13 14
Accumulated Other Comprehensive Income (Loss)        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Amounts reclassified from AOCI     504 461
Amounts reclassified from AOCI        
Amortization of defined benefit items:        
Prior service cost 17 18 34 35
Actuarial gain (loss) (23) (25) (47) (49)
Amounts reclassified from AOCI | Total foreign currency translation adjustment        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Realized investment gains (losses), net 8 7 20 20
Amounts reclassified from AOCI | Total net unrealized investment gains (losses)        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Amounts reclassified from AOCI (413) (639) (511) (467)
Amounts reclassified from AOCI | Total amortization of defined benefit items        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Amounts reclassified from AOCI (6) (7) (13) (14)
Amounts reclassified from AOCI | Accumulated Other Comprehensive Income (Loss)        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Amounts reclassified from AOCI (411) (639) (504) (461)
Amounts reclassified from AOCI | Net unrealized investment gains (losses) on available-for-sale securities        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Net unrealized investment gains (losses) (137) (735) (200) (717)
Amounts reclassified from AOCI | Interest Rate | Cash Flow Hedging        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Net unrealized investment gains (losses) (4) (17) (7) (20)
Amounts reclassified from AOCI | Currency | Cash Flow Hedging        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Net unrealized investment gains (losses) (4) 2 (3) 4
Amounts reclassified from AOCI | Currency | Fair Value Hedging        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Net unrealized investment gains (losses) (3) (3) (7) (5)
Amounts reclassified from AOCI | Currency/Interest rate | Cash Flow Hedging        
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]        
Net unrealized investment gains (losses) $ (265) $ 114 $ (294) $ 271
[1] See Note 20 for additional information regarding related party transactions.
[2] See Note 20 for additional information regarding related party transactions.