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Investments - Net investment income (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Net Investment Income: |  |  |  |
Investment income, before expense | $ 754 | $ 801 | $ 2,017 | $ 2,561
Investment expense | (64) | (37) | (171) | (115)
Net investment income | 690 | 764 | 1,846 | 2,446
Fixed income securities |  |  |  |
Net Investment Income: |  |  |  |
Investment income, before expense | 323 | 279 | 889 | 870
Equity securities |  |  |  |
Net Investment Income: |  |  |  |
Investment income, before expense | 30 | 24 | 100 | 51
Mortgage loans |  |  |  |
Net Investment Income: |  |  |  |
Investment income, before expense | 8 | 9 | 25 | 31
Limited partnership interests |  |  |  |
Net Investment Income: |  |  |  |
Investment income, before expense | 325 | 438 | 841 | 1,467
Short-term investments |  |  |  |
Net Investment Income: |  |  |  |
Investment income, before expense | 30 | 1 | 42 | 3
Other investments |  |  |  |
Net Investment Income: |  |  |  |
Investment income, before expense | $ 38 | $ 50 | $ 120 | $ 139

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- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1-5) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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- Definition Amount of expenses related to the generation of investment income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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- Definition Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(2)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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