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Variable Interest Entities Variable Interest Entity - Change in Fair Value of Assets and Liabilities (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Deconsolidated VIE Assets | $ 1,233 |  |  |  |  |  |  |  | $ 1,233 |  |
Fixed income securities, amortized cost | 3,187 |  |  |  | $ 3,451 |  |  |  | 3,187 | $ 3,451 |
Long-term debt | 2,822 |  |  |  | 2,929 |  |  |  | 2,822 | 2,929 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 132 |  |  |  | 133 |  |  |  | 132 | 133 |
Loans, Unpaid principal balance |  |  |  |  | 19 |  |  |  |  | 19 | $ 19
Variable Interest Entity Change in Fair Value of Assets and Liabilities |  |  |  |  |  |  |  |  | 13 | 3 | 20
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, before Tax |  |  |  |  |  |  |  |  |  |  | 0
Realized Investment Gains (Losses) | 9 | $ 18 | $ 36 | $ 17 | 29 | $ 30 | $ 47 | $ 5 | 81 | 112 | 5
Variable Interest Entity, Initial Consolidation, Gain (Loss) |  |  |  |  |  |  |  |  | 15 | 0 | 0
Variable Interest Entities Deconsolidation Gain Loss |  |  |  |  |  |  |  |  | (2) | 2 | 0
Variable Interest Entity, Measure of Activity, Income or Loss before Tax |  |  |  |  |  |  |  |  | 38 | 3 | 20
Variable Interest Entity, Consolidated, Carrying Amount, Assets | 292 |  |  |  |  |  |  |  | 292 |  |
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities | 364 |  |  |  |  |  |  |  | 364 |  |
Deconsolidated VIE Liabilities | 1,230 |  |  |  |  |  |  |  | 1,230 |  |
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term debt | 4,554 |  |  |  | 5,269 |  |  |  | 4,554 | 5,269 |
Interest Expense, Long-term Debt |  |  |  |  |  |  |  |  | (11) | 0 | 0
Other Expenses |  |  |  |  |  |  |  |  | (1) | 0 | 0
Variable Interest Entity, Not Primary Beneficiary, Aggregated Disclosure [Member] |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, before Tax |  |  |  |  |  |  |  |  | 0 | (1) |
Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member] |  |  |  |  |  |  |  |  |  |  |
Loans, Unpaid principal balance | 2,618 |  |  |  | 3,418 |  |  |  | 2,618 | 3,418 |
Long-term debt, Unpaid principal balance | $ 3,800 |  |  |  | $ 4,553 |  |  |  | 3,800 | 4,553 |
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, before Tax |  |  |  |  |  |  |  |  | 14 | 2 | 20
Available-for-sale Securities [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |  |  |  |  |  |  |  |
Gross Investment Income, Operating |  |  |  |  |  |  |  |  | 10 | 0 | 0
Realized Investment Gains (Losses) |  |  |  |  |  |  |  |  | $ 13 | $ 0 | $ 0
Consolidated Entities [Member] |  |  |  |  |  |  |  |  |  |  |
Number of DeConsolidated Variable Interest Entities |  |  |  |  |  |  |  |  | 1 | 4 | 1

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- Definition VIE Change in FV of Assets Liabilities, Net of Credit Risk Change + References No definition available. + Details
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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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