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Investments (Leased Real Estate Investments - Operating Leases) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Schedule of Operating Leases by Property Type [Line Items] |  |  |
Leased real estate investments, Carrying Value | $ 4,283 | $ 4,446 |
Operating Lease, Lease Income | Total revenues | Total revenues | Total revenues
Operating Lease, Lease Income | $ 341 | $ 366 | $ 392
Office |  |  |
Schedule of Operating Leases by Property Type [Line Items] |  |  |
Leased real estate investments, Carrying Value | $ 2,138 | $ 2,221 |
Operating Lease, Lease Income | Total revenues | Total revenues | Total revenues
Operating Lease, Lease Income | $ 206 | $ 228 | $ 183
Retail |  |  |
Schedule of Operating Leases by Property Type [Line Items] |  |  |
Leased real estate investments, Carrying Value | $ 766 | $ 753 |
Operating Lease, Lease Income | Total revenues | Total revenues | Total revenues
Operating Lease, Lease Income | $ 45 | $ 47 | $ 60
Apartment |  |  |
Schedule of Operating Leases by Property Type [Line Items] |  |  |
Leased real estate investments, Carrying Value | $ 596 | $ 641 |
Operating Lease, Lease Income | Total revenues | Total revenues | Total revenues
Operating Lease, Lease Income | $ 46 | $ 47 | $ 56
Land |  |  |
Schedule of Operating Leases by Property Type [Line Items] |  |  |
Leased real estate investments, Carrying Value | $ 522 | $ 564 |
Operating Lease, Lease Income | Total revenues | Total revenues | Total revenues
Operating Lease, Lease Income | $ 24 | $ 24 | $ 26
Industrial |  |  |
Schedule of Operating Leases by Property Type [Line Items] |  |  |
Leased real estate investments, Carrying Value | $ 190 | $ 200 |
Operating Lease, Lease Income | Total revenues | Total revenues | Total revenues
Operating Lease, Lease Income | $ 15 | $ 15 | $ 62
Hotel |  |  |
Schedule of Operating Leases by Property Type [Line Items] |  |  |
Leased real estate investments, Carrying Value | $ 71 | $ 67 |
Operating Lease, Lease Income | Total revenues | Total revenues | Total revenues
Operating Lease, Lease Income | $ 5 | $ 5 | $ 5
Leased real estate |  |  |
Schedule of Operating Leases by Property Type [Line Items] |  |  |
Operating Lease, Lease Income | Total revenues | Total revenues | Total revenues
Operating Lease, Lease Income | $ 341 | $ 366 | $ 392

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- Definition Indicates line item in statement of income or comprehensive income that includes operating lease income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479016/842-30-45-3 + Details
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- Definition Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-6A Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479016/842-30-45-3 + Details
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