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Investments (Changes In Allowance For Credit Losses On AFS) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] |  |  |  |
Balance | $ 20 | $ 14 | $ 19 | $ 13
Additions for securities for which credit losses were not previously recognized | 1 |  | 2 |
Additions (reductions) for securities for which credit losses were previously recognized | 3 | 1 | 4 | 2
Reductions for securities disposed |  |  | (1) |
Reductions for securities charged-off | (12) | (6) | (12) | (6)
Balance | 12 | 9 | 12 | 9
Accrued interest income on fixed maturity AFS securities |  |  | 1,000 | 1,000
Corporate Bonds [Member] |  |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] |  |  |  |
Balance | 16 | 13 | 17 | 12
Additions for securities for which credit losses were not previously recognized | 1 |  | 1 |
Additions (reductions) for securities for which credit losses were previously recognized | 2 | 1 | 2 | 2
Reductions for securities disposed |  |  | (1) |
Reductions for securities charged-off | (12) | (6) | (12) | (6)
Balance | 7 | 8 | 7 | 8
RMBS [Member] |  |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] |  |  |  |
Balance | 2 | 1 | 1 | 1
Additions (reductions) for securities for which credit losses were previously recognized | 1 |  | 2 |
Balance | 3 | $ 1 | 3 | $ 1
ABS [Member] |  |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] |  |  |  |
Balance | 1 |  | 1 |
Other [Member] |  |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] |  |  |  |
Balance | 2 |  | 1 |
Additions for securities for which credit losses were not previously recognized |  |  | 1 |
Balance | $ 2 |  | $ 2 |

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- Definition Amount of writeoff of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized by reversing interest income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 3D -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL120267862-210455 + Details
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- Definition Amount of allowance for credit loss 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aaa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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- Definition Amount of expense for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), for which no credit loss was previously recorded. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 + Details
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- Definition Amount of decrease in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) from sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 + Details
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