Consolidated Summary of Investments - Other Than Investments in Related Parties (Details) $ in Millions	Dec. 31, 2024 USD ($)
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	$ 466,023
Estimated Fair Value	441,364
Total fixed maturity securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	307,421
Estimated Fair Value	281,043
Amount at Which Shown on Balance Sheet	281,043
Foreign government
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	44,377
Estimated Fair Value	40,250
Amount at Which Shown on Balance Sheet	40,250
U.S. government and agency
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	38,963
Estimated Fair Value	33,428
Amount at Which Shown on Balance Sheet	33,428
Public utilities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	10,213
Estimated Fair Value	9,766
Amount at Which Shown on Balance Sheet	9,766
Municipals
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	11,205
Estimated Fair Value	9,873
Amount at Which Shown on Balance Sheet	9,873
All other corporate bonds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	133,760
Estimated Fair Value	122,378
Amount at Which Shown on Balance Sheet	122,378
Total bonds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	238,518
Estimated Fair Value	215,695
Amount at Which Shown on Balance Sheet	215,695
Mortgage-backed, asset-backed and collateralized loan obligations securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	67,915
Estimated Fair Value	64,359
Amount at Which Shown on Balance Sheet	64,359
Redeemable preferred stock
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	988
Estimated Fair Value	989
Amount at Which Shown on Balance Sheet	989
FVO Securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	8,284
Estimated Fair Value	10,672
Amount at Which Shown on Balance Sheet	10,672
Equity Securities, Investment Summary [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	544
Estimated Fair Value	712
Amount at Which Shown on Balance Sheet	712
Industrial, miscellaneous and all other
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	305
Estimated Fair Value	393
Amount at Which Shown on Balance Sheet	393
Public utilities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	0
Estimated Fair Value	6
Amount at Which Shown on Balance Sheet	6
Banks, trust and insurance companies
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	146
Estimated Fair Value	219
Amount at Which Shown on Balance Sheet	219
Non-redeemable Preferred Stock
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	93
Estimated Fair Value	94
Amount at Which Shown on Balance Sheet	94
Mortgage loans
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	89,812
Estimated Fair Value	89,012
Policy loans
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	8,545
Estimated Fair Value	8,545
Real estate and REJV
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	13,062
Estimated Fair Value	13,062
Real estate acquired in satisfaction of debt
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	280
Estimated Fair Value	280
OLPI (1)
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	14,378
Estimated Fair Value	14,378
Short-term investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	5,193
Estimated Fair Value	5,156
Other invested assets
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	18,504
Estimated Fair Value	$ 18,504