Consolidated Summary of Investments - Other Than Investments in Related Parties (Details) $ in Millions	Dec. 31, 2022 USD ($)
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	$ 462,275
Estimated Fair Value	433,293
Fixed Maturities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	306,025
Estimated Fair Value	276,780
Amount at Which Shown on Balance Sheet	276,780
Foreign government
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	50,047
Estimated Fair Value	46,747
Amount at Which Shown on Balance Sheet	46,747
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	35,658
Estimated Fair Value	32,229
Amount at Which Shown on Balance Sheet	32,229
Public utilities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	11,476
Estimated Fair Value	10,717
Amount at Which Shown on Balance Sheet	10,717
Municipals
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	13,548
Estimated Fair Value	12,152
Amount at Which Shown on Balance Sheet	12,152
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	135,710
Estimated Fair Value	120,916
Amount at Which Shown on Balance Sheet	120,916
Total bonds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	246,439
Estimated Fair Value	222,761
Amount at Which Shown on Balance Sheet	222,761
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	58,610
Estimated Fair Value	53,050
Amount at Which Shown on Balance Sheet	53,050
Redeemable preferred stock
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	976
Estimated Fair Value	969
Amount at Which Shown on Balance Sheet	969
FVO Securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	9,106
Estimated Fair Value	9,668
Amount at Which Shown on Balance Sheet	9,668
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	1,495
Estimated Fair Value	1,684
Amount at Which Shown on Balance Sheet	1,684
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	335
Estimated Fair Value	504
Amount at Which Shown on Balance Sheet	504
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	2
Amount at Which Shown on Balance Sheet	2
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	1,012
Estimated Fair Value	1,036
Amount at Which Shown on Balance Sheet	1,036
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	148
Estimated Fair Value	142
Amount at Which Shown on Balance Sheet	142
Mortgage loans
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	84,290
Estimated Fair Value	83,763
Policy loans
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	8,874
Estimated Fair Value	8,874
Real estate and real estate joint ventures
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	12,955
Estimated Fair Value	12,955
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	182
Estimated Fair Value	182
Other limited partnership interests
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	14,414
Estimated Fair Value	14,414
Short-term investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	4,870
Estimated Fair Value	4,935
Other invested assets
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	20,064
Estimated Fair Value	$ 20,038