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Fair Value of Financial Instruments (Schedule Of Investment Holdings Movements) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |
Issuances | $ 548 | $ 625
Sales | (221) | (17)
Maturities | (110) | (53)
Settlements | (55) | (139)
Calls | (49) | (7)
Total | 113 | 409
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |
Issuances | 336 | 267
Sales | (73) | (2)
Maturities | 2 | (7)
Settlements | (51) | (51)
Calls | (49) | (7)
Total | 165 | 200
ABS [Member] | Fixed Maturity AFS Securities [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |
Issuances | 37 | 149
Settlements | (15) |
Total | 22 | 149
Trading Securities [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |
Issuances | 37 | 207
Sales | (25) |
Settlements | (18) | (1)
Total | (6) | 206
Derivative Investments [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |
Issuances | 118 | 131
Sales | (123) | (15)
Maturities | (112) | (46)
Total | (117) | 70
Indexed Annuity Ceded Embedded Derivatives [Member] | Other Assets [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |
Issuances | 9 | 19
Settlements | (22) | (126)
Total | (13) | (107)
Indexed Annuity And IUL Contracts [Member] | Future Contract Benefits [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |
Issuances | 11 | (148)
Settlements | 51 | 39
Total | $ 62 | $ (109)

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- Definition Represents decreases to the amount of certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments) due to calls of investments during the period. The alternative investments represented by this item are subject to significant unobservable inputs (Level 3) for purposes of measuring fair value. + References No definition available. + Details
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- Definition Represents decreases to the amount of certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments) due to maturities of investments during the period. The alternative investments represented by this item are subject to significant unobservable inputs (Level 3) for purposes of measuring fair value. + References No definition available. + Details
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- Definition Represents the net increase or decrease to the amount of certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments) due to purchases, sales, issuances, or settlements during the period. The alternative investments represented by this item are subject to significant unobservable inputs (Level 3) for purposes of measuring fair value. + References No definition available. + Details
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- Definition Amount of issuances of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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