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Schedule I 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	$ 194,116
Amount Shown on Consolidated Balance Sheet	172,488
Trading securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	2,010
Fair Value	1,595
Amount Shown on Consolidated Balance Sheet	1,595
Fixed Maturities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	122,992
Fair Value	103,999
Amount Shown on Consolidated Balance Sheet	103,999
Equity securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	1,633
Fair Value	1,087
Amount Shown on Consolidated Balance Sheet	1,487
Mortgage loans, net of allowances
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	29,943
Amount Shown on Consolidated Balance Sheet	27,454
Investment funds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	79
Amount Shown on Consolidated Balance Sheet	79
Policy loans
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	347
Amount Shown on Consolidated Balance Sheet	347
Funds withheld at interest
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	32,880
Amount Shown on Consolidated Balance Sheet	32,880
Derivative
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	3,309
Amount Shown on Consolidated Balance Sheet	3,309
Short-term Investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	2,160
Amount Shown on Consolidated Balance Sheet	2,160
Other investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	773
Amount Shown on Consolidated Balance Sheet	773
US government and agencies | Foreign currency forwards
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	3,333
Fair Value	2,577
Amount Shown on Consolidated Balance Sheet	2,577
US state, municipal and political subdivisions | Foreign currency forwards
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	1,218
Fair Value	927
Amount Shown on Consolidated Balance Sheet	927
Foreign governments | Foreign currency forwards
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	1,207
Fair Value	907
Amount Shown on Consolidated Balance Sheet	907
Public utilities | Foreign currency forwards
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	10,725
Fair Value	8,665
Amount Shown on Consolidated Balance Sheet	8,665
Redeemable preferred stock | Foreign currency forwards
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	7
Fair Value	5
Amount Shown on Consolidated Balance Sheet	5
Other corporate | Foreign currency forwards
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	63,879
Fair Value	52,206
Amount Shown on Consolidated Balance Sheet	52,206
CLO | Foreign currency forwards
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	17,722
Fair Value	16,493
Amount Shown on Consolidated Balance Sheet	16,493
ABS | Foreign currency forwards
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	11,447
Fair Value	10,527
Amount Shown on Consolidated Balance Sheet	10,527
CMBS | Foreign currency forwards
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	4,636
Fair Value	4,158
Amount Shown on Consolidated Balance Sheet	4,158
RMBS | Foreign currency forwards
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	6,775
Fair Value	5,914
Amount Shown on Consolidated Balance Sheet	5,914
Industrial, miscellaneous and all other common stock | Equity securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	36
Fair Value	61
Amount Shown on Consolidated Balance Sheet	61
Nonredeemable preferred stocks | Equity securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	1,070
Fair Value	899
Amount Shown on Consolidated Balance Sheet	899
Financial Service | Equity securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	527
Fair Value	127
Amount Shown on Consolidated Balance Sheet	527
Convertibles and Bonds with Warrants Attached | Foreign currency forwards
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	33
Fair Value	25
Amount Shown on Consolidated Balance Sheet	$ 25

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