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Schedule I — Summary of Investments Other than Investments in Related Parties (Details) $ in Millions	Dec. 31, 2022 USD ($)
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	$ 64,401
Amount shown in the Balance Sheet	61,829
United States government, government agencies and authorities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	8,123
Fair value (if applicable)	7,898
Amount shown in the Balance Sheet	7,898
States, municipalities and political subdivisions
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	6,500
Fair value (if applicable)	6,210
Amount shown in the Balance Sheet	6,210
Foreign governments
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	997
Fair value (if applicable)	957
Amount shown in the Balance Sheet	957
Public utilities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	2,633
Fair value (if applicable)	2,437
Amount shown in the Balance Sheet	2,437
All other corporate bonds
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	25,929
Fair value (if applicable)	23,826
Amount shown in the Balance Sheet	23,826
Asset-backed securities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	1,188
Fair value (if applicable)	1,157
Amount shown in the Balance Sheet	1,157
Total fixed maturities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	45,370
Fair value (if applicable)	42,485
Amount shown in the Balance Sheet	42,485
Public utilities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	48
Fair value (if applicable)	60
Amount shown in the Balance Sheet	60
Banks, trusts and insurance companies
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	260
Fair value (if applicable)	340
Amount shown in the Balance Sheet	340
Industrial, miscellaneous and all other
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	3,753
Fair value (if applicable)	3,938
Amount shown in the Balance Sheet	3,938
Nonredeemable preferred stocks
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	192
Fair value (if applicable)	229
Amount shown in the Balance Sheet	229
Total equity securities
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	4,253
Fair value (if applicable)	4,567
Amount shown in the Balance Sheet	4,567
Mortgage loans on real estate
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	762
Fair value (if applicable)	700
Amount shown in the Balance Sheet	762
Real estate (none acquired in satisfaction of debt)
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	813
Amount shown in the Balance Sheet	813
Policy loans
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	120
Amount shown in the Balance Sheet	120
Derivative instruments
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	1
Fair value (if applicable)	1
Amount shown in the Balance Sheet	1
Limited partnership interests
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	8,114
Amount shown in the Balance Sheet	8,114
Other long-term investments
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	794
Amount shown in the Balance Sheet	794
Short-term investments
Summary of Investments Other Than Investments in Related Parties
Cost/amortized cost, net	4,174
Fair value (if applicable)	4,173
Amount shown in the Balance Sheet	$ 4,173

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Amount of investment held by insurance company, excluding investment in related party.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 7
-Subparagraph (SX 210.12-15(Column D))
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Cost of investment held by insurance company, excluding investment in related party.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 7
-Subparagraph (SX 210.12-15(Column B))
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 7
-Subparagraph (SX 210.12-15(Column C))
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