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Market Risk Benefits (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Market Risk Benefit [Line Items] |  |  |
Market Risk Benefit, Increase (Decrease) from Equity Market Change | $ 10 | $ (10) | $ 58
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk | 249 | 247 |
Market Risk Benefit, Net Amount at Risk | 258 | 247 |
Insurance, Other [Member] | Americas [Member] | Other Segments |  |  |
Market Risk Benefit [Line Items] |  |  |
Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change | 249 | 247 | 262
Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change | 253 | 263 | $ 254
Market Risk Benefit, Interest Expense | 14 | 54 |
Market Risk Benefit, Attributed Fee Collected | 25 | 28 |
Market Risk Benefit, Benefit Payment | (1) | (9) |
Market Risk Benefit, Increase (Decrease) from Future Expected Policyholder Behavior Assumption | 16 | 18 |
Market Risk Benefit, Increase (Decrease) from Interest Rate Change | (5) | (175) |
Market Risk Benefit, Increase (Decrease) from Equity Market Change | (52) | 48 |
Market Risk Benefit, Increase (Decrease) from Volatility | (6) | 19 |
Market Risk Benefit, Increase (Decrease) from Other Assumption | (15) | 7 |
Market Risk Benefit, Increase (Decrease) from Actual Policyholder Behavior Different from Expected | 14 | 19 |
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax | (4) | (16) |
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk | 249 | 247 |
Market Risk Benefit, Reinsurance Recoverable, after Allowance | 0 | 0 |
Market Risk Benefit, Net Amount at Risk | $ 1,401 | $ 1,630 |
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age | 71 years | 66 years |

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- Definition Amount, before tax, of accumulated other comprehensive income (loss) (AOCI) from (increase) decrease in instrument-specific credit risk on contract or contract feature in long-duration contract issued by insurance entity protecting contract holder from other-than-nominal capital market risk and exposing insurance entity to other-than-nominal capital market risk. + References Reference 1: 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 2: http://www.xbrl.org/2009/role/commonPracticeRef -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 3: http://www.xbrl.org/2009/role/commonPracticeRef -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/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 13K -Subparagraph (k) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480046/944-40-55-13K + Details
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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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