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Investmenst (Changes In Allowance For Credit Losses On Mortgage Loans On Real Estate) (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2020 USD ($)
Balance as of beginning-of-year, prior to adoption of ASU 2016-13 | $ 2
Additions from provision for credit loss expense | 71
Balance as of end-of-period | 161
Accrued interest receivable excluded from credit losses | 50
Cumulative Effect, Period of Adoption, Adjustment [Member] |
Balance as of end-of-period | 88
Commercial [Member] |
Additions from provision for credit loss expense | 64
Balance as of end-of-period | 126
Commercial [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |
Balance as of end-of-period | 62
Residential [Member] |
Balance as of beginning-of-year, prior to adoption of ASU 2016-13 | 2
Additions from provision for credit loss expense | 7
Balance as of end-of-period | 35
Residential [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |
Balance as of end-of-period | $ 26

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- Definition Amount, before allowance for credit loss, of accrued interest on financing receivable. + References No definition available. + Details
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Period Type: | instant

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- Definition Amount of credit loss expense (reversal of expense) for financing receivable, recorded allowance. + References No definition available. + Details
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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
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