Transition Date Adoption Impacts (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2020
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves	$ 694	$ 665
Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance			$ 3,560
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves		665	287
As originally reported | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance			2,915
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves		640	217
Effect of Modified Retrospective Application Accounting Standards Update 2018-12 | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Removal of shadow adjustments			13
Net premiums in excess of gross premiums			15
Remeasurement at market value discount rates			617
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves		$ 25
Remeasurement at market value discount rates			47
Other adjustments			23
Term Life Insurance | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance			1,287
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves			162
Term Life Insurance | As originally reported | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance			901
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves			113
Term Life Insurance | Effect of Modified Retrospective Application Accounting Standards Update 2018-12 | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Removal of shadow adjustments			0
Net premiums in excess of gross premiums			14
Remeasurement at market value discount rates			372
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Remeasurement at market value discount rates			29
Other adjustments			20
Whole Life Insurance | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance			609
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves			45
Whole Life Insurance | As originally reported | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance			363
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves			26
Whole Life Insurance | Effect of Modified Retrospective Application Accounting Standards Update 2018-12 | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Removal of shadow adjustments			0
Net premiums in excess of gross premiums			1
Remeasurement at market value discount rates			245
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Remeasurement at market value discount rates			18
Other adjustments			1
Deferred Fixed Annuity | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance			761
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves			0
Deferred Fixed Annuity | As originally reported | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance			761
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves			0
Deferred Fixed Annuity | Effect of Modified Retrospective Application Accounting Standards Update 2018-12 | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Removal of shadow adjustments			0
Net premiums in excess of gross premiums			0
Remeasurement at market value discount rates			0
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Remeasurement at market value discount rates			0
Other adjustments			0
Universal life | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance			567
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves			2
Universal life | As originally reported | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance			567
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves			0
Universal life | Effect of Modified Retrospective Application Accounting Standards Update 2018-12 | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Removal of shadow adjustments			0
Net premiums in excess of gross premiums			0
Remeasurement at market value discount rates			0
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Remeasurement at market value discount rates			0
Other adjustments			2
Long-Duration Insurance, Other | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance			336
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves			78
Long-Duration Insurance, Other | As originally reported | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance			323
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Life policy and investment contract reserves			78
Long-Duration Insurance, Other | Effect of Modified Retrospective Application Accounting Standards Update 2018-12 | Accounting Standards Update 2018-12
ASU 2018-12 Adoption Impacts to the life policy and investment contract reserves
Removal of shadow adjustments			13
Net premiums in excess of gross premiums			0
Remeasurement at market value discount rates			0
ASU 2018-12 Adoption Impacts to the Life Reinsurance Recoverable Assets
Remeasurement at market value discount rates			0
Other adjustments			$ 0