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Investments - Schedule of Commercial Mortgage Loans Segregated By Aging of Loans and Charge Offs (Details) - Commercial Mortgage - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
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Credit Quality Indicator Current Year [Abstract] |  |
Year one | $ 99 | $ 273
Year two | 283 | 227
Year three | 228 | 290
Year four | 290 | 1,253
Year five | 1,253 | 469
Prior | 652 | 210
Total | 2,805 | 2,722
Credit Quality Indicator Prior Year [Abstract] |  |
Year one | 99 | 273
Year two | 283 | 227
Year three | 228 | 290
Year four | 290 | 1,253
Year five | 1,253 | 469
Prior | 652 | 210
Total | 2,805 | 2,722
Current (less than 30 days past due) |  |
Credit Quality Indicator Current Year [Abstract] |  |
Year one | 99 | 273
Year two | 283 | 227
Year three | 228 | 290
Year four | 290 | 1,253
Year five | 1,253 | 469
Prior | 642 | 201
Total | 2,795 | 2,713
Credit Quality Indicator Prior Year [Abstract] |  |
Year one | 99 | 273
Year two | 283 | 227
Year three | 228 | 290
Year four | 290 | 1,253
Year five | 1,253 | 469
Prior | 642 | 201
Total | 2,795 | 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 | 10 | 9
Total | 10 | 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 | 10 | 9
Total | $ 10 | $ 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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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
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