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Variable Interest Entities (FV Options for consolidated CDOs) (Details 3) - Consolidated investment entities [Member] - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Syndicated loans [Abstract] |  |  |  |  |  |
Unpaid principal balance |  | $ 1,705 |  | $ 1,705 |  | $ 1,743
Excess unpaid principal over fair value |  | (65) |  | (65) |  | (52)
Fair value |  | 1,640 |  | 1,640 |  | 1,691
Fair value of loans more than 90 days past due |  | 10 |  | 10 |  | 0
Fair value of loans in nonaccrual status |  | 46 |  | 46 |  | 0
Difference between fair value and unpaid principal of loans more than 90 days past due, loans in nonaccrual status or both |  | 12 |  | 12 |  | 0
Debt [Abstract] |  |  |  |  |  |
Unpaid principal balance |  | 1,788 |  | 1,788 |  | 1,951
Excess unpaid principal over fair value |  | (118) |  | (118) |  | (208)
Carrying value | [1] | 1,670 |  | 1,670 |  | 1,743
Estimated fair value of CLO debt |  | 1,700 |  | 1,700 |  | $ 1,700
Net investment income [Member] |  |  |  |  |  |
Debt [Abstract] |  |  |  |  |  |
Total net gains (losses) recognized in net investment income related to changes in the fair value of financial assets and liabilities for which the fair value option was elected |  | $ (3) | $ 5 | $ (8) | $ 29 |
[1] | The carrying value of the CLOs’ debt is set equal to the fair value of the CLOs’ assets. The estimated fair value of the CLOs’ debt was $1.7 billion as of both September 30, 2019 and December 31, 2018.

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 + Details
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- Definition This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans and long-term receivables (other than securities categorized as trading, available-for-sale or held-to-maturity) that have contractual principal amounts and for which the fair value option has been elected. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 + Details
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- Definition This item represents the aggregate fair value of loans held as assets that are 90 days or more past due for which the fair value option has been elected. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 + Details
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