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Investments (OTTI Recognized In Net Income (Loss) And OCI) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
OTTI Recognized in Net Income (Loss) |  |  |
Gross OTTI recognized in net income (loss) | $ (16) | $ (7) | $ (20)
Associated amortization of DAC, VOBA, DSI and DFEL | 1 |  | 2
Net OTTI recognized in net income (loss) | (15) | (7) | (18)
OTTI Recognized in OCI |  |  |
Gross OTTI recognized in OCI | 16 |  |
Change in DAC, VOBA, DSI and DFEL | (1) |  |
Net OTTI recognized in OCI | 15 |  |
Fixed Maturity AFS Securities [Member] | Corporate Bonds [Member] |  |  |
OTTI Recognized in Net Income (Loss) |  |  |
Gross OTTI recognized in net income (loss) | (14) | (5) | (13)
Fixed Maturity AFS Securities [Member] | ABS [Member] |  |  |
OTTI Recognized in Net Income (Loss) |  |  |
Gross OTTI recognized in net income (loss) | (1) | (1) | (2)
Fixed Maturity AFS Securities [Member] | RMBS [Member] |  |  |
OTTI Recognized in Net Income (Loss) |  |  |
Gross OTTI recognized in net income (loss) | $ (1) | $ (1) | (2)
Fixed Maturity AFS Securities [Member] | CMBS [Member] |  |  |
OTTI Recognized in Net Income (Loss) |  |  |
Gross OTTI recognized in net income (loss) |  |  | (2)
Fixed Maturity AFS Securities [Member] | State And Municipal Bonds [Member] |  |  |
OTTI Recognized in Net Income (Loss) |  |  |
Gross OTTI recognized in net income (loss) |  |  | $ (1)

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- Definition This line item represents the change in deferred acquisition costs, value of business acquired, deferred sales inducements and deferred front-end loads on gross other-than-temporary impairment losses recognized in other comprehensive income (loss). + References No definition available. + Details
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- Definition Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8A -URI http://asc.fasb.org/extlink&oid=118954083&loc=SL6284422-111562 + Details
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