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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
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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Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year

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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

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