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Investments - Schedule of Commercial Mortgage Loans Segregated By Aging of Loans and Charge Offs (Details) - Commercial Mortgage - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
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Credit Quality Indicator Current Year [Abstract] |  |
Year one | $ 355 | $ 273
Year two | 300 | 227
Year three | 234 | 290
Year four | 291 | 1,253
Year five | 1,253 | 469
Prior | 652 | 210
Total | 3,085 | 2,722
Credit Quality Indicator Prior Year [Abstract] |  |
Year one | 355 | 273
Year two | 300 | 227
Year three | 234 | 290
Year four | 291 | 1,253
Year five | 1,253 | 469
Prior | 652 | 210
Total | 3,085 | 2,722
Current (less than 30 days past due) |  |
Credit Quality Indicator Current Year [Abstract] |  |
Year one | 355 | 273
Year two | 300 | 227
Year three | 234 | 290
Year four | 291 | 1,253
Year five | 1,253 | 469
Prior | 643 | 201
Total | 3,076 | 2,713
Credit Quality Indicator Prior Year [Abstract] |  |
Year one | 355 | 273
Year two | 300 | 227
Year three | 234 | 290
Year four | 291 | 1,253
Year five | 1,253 | 469
Prior | 643 | 201
Total | 3,076 | 2,713
30-89 days past due |  |
Credit Quality Indicator Current Year [Abstract] |  |
Year one | 0 | 0
Year two | 0 | 0
Year three | 0 | 0
Year four | 0 | 0
Year five | 0 | 0
Prior | 0 | 0
Total | 0 | 0
Credit Quality Indicator Prior Year [Abstract] |  |
Year one | 0 | 0
Year two | 0 | 0
Year three | 0 | 0
Year four | 0 | 0
Year five | 0 | 0
Prior | 0 | 0
Total | 0 | 0
90 days or more past due |  |
Credit Quality Indicator Current Year [Abstract] |  |
Year one | 0 | 0
Year two | 0 | 0
Year three | 0 | 0
Year four | 0 | 0
Year five | 0 | 0
Prior | 9 | 9
Total | 9 | 9
Credit Quality Indicator Prior Year [Abstract] |  |
Year one | 0 | 0
Year two | 0 | 0
Year three | 0 | 0
Year four | 0 | 0
Year five | 0 | 0
Prior | 9 | 9
Total | $ 9 | $ 9

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- Definition Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year + References No definition available. + Details
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