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Investments (Securities Pledged as Collateral Related to Repurchase Reverse Repurchase Program) (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Assets Sold under Agreements to Repurchase [Line Items] |  |
Document Period End Date | Sep. 30, 2020 |
Securities Loaned, Fair Value of Collateral | $ 104 | $ 104
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 405 | 384
Obligation to Return Securities Received as Collateral | 509 | 488
Securities Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement | 484 | 478
SecuredBorrowingsGrossDifferenceAmount | 25 | 10
Maturity Overnight [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 0 | 0
Obligation to Return Securities Received as Collateral | 0 | 0
Maturity up to 30 days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 0 | 0
Obligation to Return Securities Received as Collateral | 0 | 0
Maturity 30 to 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 0 | 0
Obligation to Return Securities Received as Collateral | 0 | 0
Maturity over 90 days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 405 | 384
Obligation to Return Securities Received as Collateral | 509 | 488
Corporate Debt Securities [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Securities Loaned, Fair Value of Collateral | 104 | 104
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 298 | 286
Corporate Debt Securities [Member] | Maturity Overnight [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Securities Loaned, Fair Value of Collateral | 0 | 0
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 0 | 0
Corporate Debt Securities [Member] | Maturity up to 30 days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Securities Loaned, Fair Value of Collateral | 0 | 0
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 0 | 0
Corporate Debt Securities [Member] | Maturity 30 to 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Securities Loaned, Fair Value of Collateral | 0 | 0
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 0 | 0
Corporate Debt Securities [Member] | Maturity over 90 days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Securities Loaned, Fair Value of Collateral | 104 | 104
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 298 | 286
Debt Security, Government, Non-US [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 107 | 98
Debt Security, Government, Non-US [Member] | Maturity Overnight [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 0 | 0
Debt Security, Government, Non-US [Member] | Maturity up to 30 days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 0 | 0
Debt Security, Government, Non-US [Member] | Maturity 30 to 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | 0 | 0
Debt Security, Government, Non-US [Member] | Maturity over 90 days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement | $ 107 | $ 98

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- Definition Amount, before effects of master netting arrangements, of funds outstanding borrowed in the form of a financial asset repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same financial asset at a date certain for a specified price. Includes repurchase-to-maturity transactions and liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 7 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 7 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729 + Details
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- Definition The fair value of collateral received by the entity associated with securities borrowed that must be returned if the counterparty fulfills its obligations. It appears on the balance sheet as a liability and has a corresponding asset that appears on the balance sheet called Securities Received as Collateral. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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