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Investments - Mortgage Loans, Net (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |
Mortgage Loans | $ 38,077 | $ 30,811
Mortgage loans |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Mark to fair value | (3,045) | (2,842)
Commercial mortgage loans |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Mortgage loans, net of allowances | 22,871 | 20,108
Mark to fair value | (1,986) | (1,743)
Investment Owned, Balance, Principal Amount | 24,857 | 21,851
Commercial mortgage loans | Commercial mortgage loans |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Investment Owned, Balance, Principal Amount | 23,891 | 21,061
Commercial mortgage loans | Commercial mortgage loans under development |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Investment Owned, Balance, Principal Amount | 966 | 790
Residential mortgage loans |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Mortgage loans, before allowance for credit losses | 16,265 | 11,802
Mortgage loans, net of allowances | 15,206 | 10,703
Mark to fair value | $ (1,059) | $ (1,099)

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- Definition This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans and long-term receivables (other than securities categorized as trading, available-for-sale or held-to-maturity) that have contractual principal amounts and for which the fair value option has been elected. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-28 + Details
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- Definition The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio. + 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)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
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