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Long-duration Contracts - Significant Inputs and Assumptions (Details) $ in Millions | Jun. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) | Jun. 30, 2022 USD ($)
--- | --- | --- | ---
Market Risk Benefit [Line Items] |  |  |
Net liability | $ 2,762 | $ 2,855 | $ 2,674
Nonperformance risk | Discounted cash flow | Minimum |  |  |
Market Risk Benefit [Line Items] |  |  |
Market risk benefit, measurement input (in percent) | 0.004 |  | 0.005
Nonperformance risk | Discounted cash flow | Maximum |  |  |
Market Risk Benefit [Line Items] |  |  |
Market risk benefit, measurement input (in percent) | 0.018 |  | 0.020
Nonperformance risk | Discounted cash flow | Weighted average |  |  |
Market Risk Benefit [Line Items] |  |  |
Market risk benefit, measurement input (in percent) | 0.015 |  | 0.016
Option budget | Discounted cash flow | Minimum |  |  |
Market Risk Benefit [Line Items] |  |  |
Market risk benefit, measurement input (in percent) | 0.005 |  | 0.005
Option budget | Discounted cash flow | Maximum |  |  |
Market Risk Benefit [Line Items] |  |  |
Market risk benefit, measurement input (in percent) | 0.057 |  | 0.040
Option budget | Discounted cash flow | Weighted average |  |  |
Market Risk Benefit [Line Items] |  |  |
Market risk benefit, measurement input (in percent) | 0.018 |  | 0.016
Surrender rate | Discounted cash flow | Minimum |  |  |
Market Risk Benefit [Line Items] |  |  |
Market risk benefit, measurement input (in percent) | 0.033 |  | 0.033
Surrender rate | Discounted cash flow | Maximum |  |  |
Market Risk Benefit [Line Items] |  |  |
Market risk benefit, measurement input (in percent) | 0.069 |  | 0.068
Surrender rate | Discounted cash flow | Weighted average |  |  |
Market Risk Benefit [Line Items] |  |  |
Market risk benefit, measurement input (in percent) | 0.045 |  | 0.045
Measurement Input, Utilization Rate | Discounted cash flow | Minimum |  |  |
Market Risk Benefit [Line Items] |  |  |
Market risk benefit, measurement input (in percent) | 0.286 |  | 0.286
Measurement Input, Utilization Rate | Discounted cash flow | Maximum |  |  |
Market Risk Benefit [Line Items] |  |  |
Market risk benefit, measurement input (in percent) | 0.950 |  | 0.950
Measurement Input, Utilization Rate | Discounted cash flow | Weighted average |  |  |
Market Risk Benefit [Line Items] |  |  |
Market risk benefit, measurement input (in percent) | 0.831 |  | 0.816

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- Definition Amount, before effect of reinsurance and after accumulated increase (decrease) in instrument-specific credit risk, of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480016/944-40-65-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29G -Publisher FASB -URI https://asc.fasb.org//1943274/2147480046/944-40-55-29G Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 7B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-7B Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480112/944-40-45-3 + Details
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