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Fair Value of Assets and Liabilities (Quantitative Info for Level 3 Inputs) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Future policy benefits | $ 290,536 | $ 306,343
Fair Value, Measurements, Recurring |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Future policy benefits | 11,314 | 18,879
Policyholders' account balances | $ 2,171 | 1,914
Level 3 | Minimum |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Fair Value Inputs, Policyholder Age | 45 years |
Level 3 | Minimum | Future policy benefits |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Mortality rate | 0.00% |
Level 3 | Maximum |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Fair Value Inputs, Policyholder Age | 90 years |
Level 3 | Fair Value, Measurements, Recurring |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Future policy benefits | $ 11,314 | 18,879
Policyholders' account balances | $ 2,171 | $ 1,914
Level 3 | Internal | Minimum | Discounted cash flow | Future policy benefits |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Lapse rate | 1.00% | 1.00%
Spread over LIBOR | 0.09% | 0.06%
Utilization rate | 39.00% | 39.00%
Withdrawal rate (greater than maximum range) | 76.00% | 76.00%
Mortality rate | 0.00% | 0.00%
Equity volatility curve | 17.00% | 18.00%
Level 3 | Internal | Minimum | Discounted cash flow | Policyholders' account balances |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Lapse rate | 1.00% | 1.00%
Spread over LIBOR | 0.09% | 0.06%
Mortality rate | 0.00% | 0.00%
Equity volatility curve | 6.00% | 6.00%
Level 3 | Internal | Minimum | Discounted cash flow | Corporate securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Discount rate | 0.40% | 0.40%
Level 3 | Internal | Minimum | Discounted cash flow | Equity securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Discount rate | 0.50% | 0.50%
Level 3 | Internal | Minimum | Discounted cash flow | Separate accounts commercial mortgage loan |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Spread | 1.10% | 1.60%
Level 3 | Internal | Minimum | Market comparables | Corporate securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
EBITDA multiples | 7.3 | 7.0
Level 3 | Internal | Minimum | Market comparables | Equity securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
EBITDA multiples | 0.1 | 1
Level 3 | Internal | Minimum | Liquidation | Corporate securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Liquidation value | 12.86% | 12.13%
Level 3 | Internal | Minimum | Net asset value | Equity securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Share price | 12 | 1
Level 3 | Internal | Maximum | Discounted cash flow | Future policy benefits |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Lapse rate | 20.00% | 20.00%
Spread over LIBOR | 1.14% | 1.17%
Utilization rate | 96.00% | 96.00%
Withdrawal rate (greater than maximum range) | 100.00% | 100.00%
Mortality rate | 15.00% | 15.00%
Equity volatility curve | 25.00% | 26.00%
Level 3 | Internal | Maximum | Discounted cash flow | Policyholders' account balances |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Lapse rate | 42.00% | 42.00%
Spread over LIBOR | 1.14% | 1.17%
Mortality rate | 24.00% | 24.00%
Equity volatility curve | 42.00% | 42.00%
Level 3 | Internal | Maximum | Discounted cash flow | Corporate securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Discount rate | 30.00% | 25.00%
Level 3 | Internal | Maximum | Discounted cash flow | Equity securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Discount rate | 20.00% | 20.00%
Level 3 | Internal | Maximum | Discounted cash flow | Separate accounts commercial mortgage loan |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Spread | 2.27% | 2.98%
Level 3 | Internal | Maximum | Market comparables | Corporate securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
EBITDA multiples | 15.0 | 15.0
Level 3 | Internal | Maximum | Market comparables | Equity securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
EBITDA multiples | 7.3 | 8.8
Level 3 | Internal | Maximum | Liquidation | Corporate securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Liquidation value | 71.23% | 15.00%
Level 3 | Internal | Maximum | Net asset value | Equity securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Share price | 1,414 | 1,414
Level 3 | Internal | Weighted Average | Discounted cash flow | Corporate securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Discount rate | 4.90% | 4.28%
Level 3 | Internal | Weighted Average | Discounted cash flow | Separate accounts commercial mortgage loan |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Spread | 1.25% | 1.80%
Level 3 | Internal | Weighted Average | Market comparables | Corporate securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
EBITDA multiples | 10.4 | 9.0
Level 3 | Internal | Weighted Average | Market comparables | Equity securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
EBITDA multiples | 0.9 | 3.3
Level 3 | Internal | Weighted Average | Liquidation | Corporate securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Liquidation value | 58.29% | 13.02%
Level 3 | Internal | Weighted Average | Net asset value | Equity securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Share price | 472 | 495
Level 3 | Internal | Fair Value, Measurements, Recurring | Future policy benefits |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Future policy benefits | $ 11,314 | $ 18,879
Level 3 | Internal | Fair Value, Measurements, Recurring | Policyholders' account balances |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Policyholders' account balances | 2,171 | 1,914
Level 3 | Internal | Fair Value, Measurements, Recurring | Corporate securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Corporate securities | 4,486 | 3,697
Level 3 | Internal | Fair Value, Measurements, Recurring | Equity securities |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Equity securities | 236 | 195
Level 3 | Internal | Fair Value, Measurements, Recurring | Separate accounts commercial mortgage loan |  |
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] |  |
Commercial mortgage loans | $ 162 | $ 775

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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References No definition available. + Details
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- Definition The aggregate amount of policy reserves (provided for future obligations including unpaid claims and claims adjustment expenses) and policy benefits (liability for future policy benefits) as of the balance sheet date; grouped amount of all the liabilities associated with the company's insurance policies. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(13)(a)(1)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (cc) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437 + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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