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Insurance (Future Policy Benefits - Reconciliation) (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Liability for Future Policy Benefit, before Reinsurance | $ 32,286 | $ 36,373
Liabilities reported in the preceding rollforward tables |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Liability for Future Policy Benefit, before Reinsurance | 20,119 | 22,608
Long-term care insurance (1) |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Liability for Future Policy Benefit, before Reinsurance | 5,763 | 6,708
ULSG liability for profits followed by losses |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Liability for Future Policy Benefit, before Reinsurance | 2,654 | 3,461
Participating whole life insurance (2) |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Liability for Future Policy Benefit, before Reinsurance | $ 2,986 | $ 2,788
Participating Insurance, Percentage of Gross Insurance in Force | 3.00% | 3.00%
Participating Insurance, Percentage of Premium Income | 39.00% | 34.00%
Participating whole life insurance (2) | Minimum |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Liability for Future Policy Benefits, Interest Rate Assumption | 3.5 |
Participating whole life insurance (2) | Maximum |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Liability for Future Policy Benefits, Interest Rate Assumption | 4.5 |
Deferred profit liabilities |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Liability for Future Policy Benefit, before Reinsurance | $ 373 | $ 378
Other |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Liability for Future Policy Benefit, before Reinsurance | $ 391 | $ 430

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- Definition Amount, before effect of reinsurance, of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (g)(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 29E -Publisher FASB -URI https://asc.fasb.org//1943274/2147480046/944-40-55-29E Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-6 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(13)(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-6 + Details
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- Definition Relevant interest rate assumptions that are an integral part of the methodology used in calculating the future benefits to be paid to or on behalf of policyholders and related expenses less the present value of future net premiums using assumptions such as estimates of expected investment yields, mortality, morbidity, terminations and expenses, applicable at the time the insurance contracts are made and cost of settling insured claims and cost incurred in the claim settlement process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-6 + Details
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