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Investments (Mortgage Loans - Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums | $ (828) |  | $ (736)
Financing Receivable, Purchase | 484 | $ 823 |
Mortgage Loans, Gross | $ 92,272 |  | $ 93,227
Percentage of Mortgage Loans Classified as Performing | 99.00% |  | 99.00%
Commercial Mortgage Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Interest Receivable | $ 279 |  | $ 277
Mortgage Loans, Gross | 59,359 |  | 60,326
Commercial Mortgage Loans | Extended Maturity |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amortized Cost of Mortgage Loans Delinquent during the period | 182 |  |
Residential Mortgage Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Interest Receivable | 99 |  | 95
Mortgage Loans, Gross | 13,201 |  | 13,096
Agricultural Mortgage Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Interest Receivable | 167 |  | 204
Mortgage Loans, Gross | $ 19,712 |  | $ 19,805

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