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Investments (Real Estate and Real Estate Joint Ventures) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Real Estate [Line Items] |  |  |
Leased real estate investments, Carrying Value | $ 4,206 |  | $ 4,446
Other real estate investments, Carrying Value | 511 |  | 507
Real estate joint ventures, Carrying Value | 8,275 |  | 8,379
Real Estate Investments, Net | 12,992 |  | $ 13,332
Income (Loss) from Equity Method Investments | 210 | $ (93) |
Real Estate and Real Estate Joint Ventures |  |  |
Real Estate [Line Items] |  |  |
Gross Investment Income, Operating | 10 | 26 |
Leased real estate |  |  |
Real Estate [Line Items] |  |  |
Operating Lease, Lease Income | $ 84 | $ 92 |
Operating Lease, Lease Income | Revenues | Revenues |
Other real estate |  |  |
Real Estate [Line Items] |  |  |
Operating Lease, Lease Income | $ 47 | $ 50 |
Operating Lease, Lease Income | Revenues | Revenues |
Real estate joint ventures |  |  |
Real Estate [Line Items] |  |  |
Income (Loss) from Equity Method Investments | $ (121) | $ (116) |

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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://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(3)(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1 + 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://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
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