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Investments (Real Estate and Real Estate Joint Ventures) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Real Estate [Line Items] |  |  |
Leased real estate investments, Carrying Value | $ 4,523 | $ 5,146 |
Other real estate investments, Carrying Value | 487 | 474 |
Real estate joint ventures, Carrying Value | 8,127 | 6,596 |
Real Estate Investments, Net | 13,137 | 12,216 |
Income (Loss) from Equity Method Investments | 1,305 | 5,136 | $ 829
Real Estate and Real Estate Joint Ventures |  |  |
Real Estate [Line Items] |  |  |
Gross Investment Income, Operating | $ 1,200 | $ 954 | $ 532
Leased real estate |  |  |
Real Estate [Line Items] |  |  |
Operating Lease, Lease Income | Total revenues | Total revenues | Total revenues
Other real estate |  |  |
Real Estate [Line Items] |  |  |
Operating Lease, Lease Income | Total revenues | Total revenues | Total revenues
Real estate joint ventures |  |  |
Real Estate [Line Items] |  |  |
Income (Loss) from Equity Method Investments | $ 556 | $ 326 | $ (36)

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- Definition Amount, before 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://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 of real estate investments, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; (7) other real estate investments; (8) real estate joint ventures; and (9) unconsolidated real estate and other joint ventures not separately presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- Definition Amount of real estate owned for income production and capital accretion potential, not otherwise specified in the existing taxonomy. Such real estate excludes that which is occupied or used in the business, for entertainment purposes, or held in inventory for specific purposes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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