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Investments (Mortgage Loans Allowances Gross charge-offs by Portfolio Segment) (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Charge-offs, net of recoveries | $ 51 | $ 35
Commercial Mortgage Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Charge-offs, net of recoveries | 51 | $ 28
Commercial Mortgage Loans | OriginatedInCurrentFiscalYear |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Charge-offs, net of recoveries | 0 |
Commercial Mortgage Loans | Originated In Fiscal Year Before Latest Fiscal Year |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Charge-offs, net of recoveries | 0 |
Commercial Mortgage Loans | Originated Two Years Before Latest Fiscal Year |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Charge-offs, net of recoveries | 0 |
Commercial Mortgage Loans | Originated Three Years Before Latest Fiscal Year |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Charge-offs, net of recoveries | 0 |
Commercial Mortgage Loans | Originated Four Years Before Latest Fiscal Year |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Charge-offs, net of recoveries | 0 |
Commercial Mortgage Loans | Originated Five Or More Years Before Latest Fiscal Year |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Charge-offs, net of recoveries | $ 51 |

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