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

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

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Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year

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Financing Receivable, Excluding Loans In Process, Excluding Accrued Interest, Year Three, Originated, Two 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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