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v3.19.3.a.u2

Investments (Narrative) (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) security item | Dec. 31, 2018 USD ($) security item | Dec. 31, 2017 USD ($)
Investment [Line Items] |  |  |
Increase (decrease) in gross AFS securities unrealized losses | $ 2,200 |  |
Unrealized gain (loss), trading securities | $ 228 | $ (58) | $ 7
Number of partnerships in alternative investment portfolio | item | 258 | 237 |
Alternative investments as a percentage of overall invested assets | 1.00% | 1.00% |
Fair value of collateral received that we are permitted to sell or re-pledge | $ 25 |  |
Securities that have been re-pledged | 25 |  |
Investment commitments | 2,000 |  |
Investment commitments for limited partnerships | 1,000 |  |
Investment commitments for mortgage loans on real estate | 553 |  |
Investment commitments for private placements | 425 |  |
Federal Home Loan Mortgage Corporation [Member] | Investments [Member] |  |  |
Investment [Line Items] |  |  |
Fair value | $ 1,300 | $ 1,400 |
Concentration risk, percentage | 1.00% | 1.00% |
Federal National Mortgage Association [Member] | Investments [Member] |  |  |
Investment [Line Items] |  |  |
Fair value | $ 1,000 | $ 1,300 |
Concentration risk, percentage | 1.00% | 1.00% |
Consumer Non-Cyclical Industry [Member] | Investments [Member] |  |  |
Investment [Line Items] |  |  |
Fair value | $ 16,300 | $ 14,500 |
Concentration risk, percentage | 12.00% | 13.00% |
Financial Service [Member] | Investments [Member] |  |  |
Investment [Line Items] |  |  |
Fair value | $ 16,400 | $ 14,200 |
Concentration risk, percentage | 12.00% | 12.00% |
Corporate Bonds [Member] |  |  |
Investment [Line Items] |  |  |
Percentage of fair value rated as investment grade | 96.00% | 96.00% |
Amortized cost of portfolio rated below investment grade | $ 3,200 |  |
Fair value of portfolio rated below investment grade | $ 3,300 | $ 3,000 |
MBS [Member] |  |  |
Investment [Line Items] |  |  |
Severity of second lien loans | 100.00% |  |
Severity of first lien loans | 30.00% |  |
Commercial [Member] |  |  |
Investment [Line Items] |  |  |
Number of impaired loans | security | 1 | 0 |
Commercial [Member] | Maximum [Member] |  |  |
Investment [Line Items] |  |  |
Impaired financing receivable, principal balance | $ 1 |  |
Commercial [Member] | Mortgage Loans On Real Estate [Member] | Geographic Concentration Risk [Member] | California [Member] |  |  |
Investment [Line Items] |  |  |
Concentration risk, percentage | 24.00% | 23.00% |
Commercial [Member] | Mortgage Loans On Real Estate [Member] | Geographic Concentration Risk [Member] | Texas [Member] |  |  |
Investment [Line Items] |  |  |
Concentration risk, percentage | 11.00% | 12.00% |
Residential [Member] |  |  |
Investment [Line Items] |  |  |
Number of loans past due | security | 38 | 0 |
Number of impaired loans | security | 4 | 0 |
Impaired financing receivable, principal balance | $ 1 |  |
Impaired financing receivable, allowance | $ 2 |  |
Residential [Member] | Maximum [Member] |  |  |
Investment [Line Items] |  |  |
Impaired financing receivable, allowance |  | $ 1 |
Residential [Member] | Mortgage Loans On Real Estate [Member] | Geographic Concentration Risk [Member] | California [Member] |  |  |
Investment [Line Items] |  |  |
Concentration risk, percentage | 34.00% | 34.00% |
Residential [Member] | Mortgage Loans On Real Estate [Member] | Geographic Concentration Risk [Member] | Florida [Member] |  |  |
Investment [Line Items] |  |  |
Concentration risk, percentage | 20.00% | 19.00% |

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