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Investments (Real Estate and Real Estate Joint Ventures) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Real Estate [Line Items] |  |  |  |  |
Leased real estate investments, Carrying Value | $ 4,519 |  | $ 4,519 |  | $ 5,146
Other real estate investments, Carrying Value | 478 |  | 478 |  | 474
Real estate joint ventures, Carrying Value | 7,379 |  | 7,379 |  | 6,596
Real Estate Investments, Net | 12,376 |  | 12,376 |  | $ 12,216
Income (Loss) from Equity Method Investments | 386 | $ 1,000 | 1,500 | $ 2,300 |
Real Estate and Real Estate Joint Ventures |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Gross Investment Income, Operating | 379 | 205 | 707 | 381 |
Leased real estate |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Operating Lease, Lease Income | 98 | 108 | 204 | 219 |
Other real estate |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Operating Lease, Lease Income | 68 | 44 | 100 | 86 |
Real estate joint ventures |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Income (Loss) from Equity Method Investments | $ 213 | $ 53 | $ 403 | $ 76 |

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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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