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Investments - Change in unrealized net capital gains and losses (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2018
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) |  |  |  |
Change in unrealized net capital gains and losses | $ 2,711 | $ (1,434) | $ 857 |
Amounts recognized for: |  |  |  |
Insurance reserves | (126) | 315 | (315) |
DAC and DSI | (191) | 163 | (50) |
Amounts recognized | (317) | 478 | (365) |
Deferred income taxes | (505) | 202 | 117 |
Increase (decrease) in unrealized net capital gains and losses, after-tax | 1,889 | (754) | 609 |
Equity securities |  |  |  | $ 1,160
EMA limited partnerships |  |  |  |
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) |  |  |  |
Change in unrealized net capital gains and losses | (4) | (1) | 5 |
Fixed income securities |  |  |  |
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) |  |  |  |
Change in unrealized net capital gains and losses | 2,715 | (1,431) | 204 |
Equity securities |  |  |  |
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) |  |  |  |
Change in unrealized net capital gains and losses | 0 | 0 | 651 |
Derivatives |  |  |  |
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) |  |  |  |
Change in unrealized net capital gains and losses | $ 0 | $ (2) | $ (3) |

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- Definition The amount of unrealized gains (losses) included in accumulated other comprehensive income on equity securities which are categorized neither as held-to-maturity nor trading securities, as a result of fair value exceeding (under) its amortized cost, as of the balance sheet date. + References No definition available. + Details
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- Definition Amount before tax, after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580 + Details
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