Investments (excluding Consolidated Investment Entities) - Loans by Loan to Value (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2026	Dec. 31, 2025
Schedule of Loans by Loan to Value Ratio [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 210	$ 968
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	975	345
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	341	293
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	272	588
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	553	466
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	3,313	2,948
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 5,664	$ 5,608
0% - 50%
Schedule of Loans by Loan to Value Ratio [Line Items]
Loan to value ratio, minimum	0.00%	0.00%
Loan to value ratio, maximum	50.00%	50.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 68	$ 387
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	394	180
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	200	90
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	73	249
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	249	227
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	2,935	2,783
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 3,919	$ 3,916
50% - 60%
Schedule of Loans by Loan to Value Ratio [Line Items]
Loan to value ratio, minimum	50.00%	50.00%
Loan to value ratio, maximum	60.00%	60.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 114	$ 489
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	489	147
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	123	203
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	199	254
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	224	185
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	322	163
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 1,471	$ 1,441
60% - 70%
Schedule of Loans by Loan to Value Ratio [Line Items]
Loan to value ratio, minimum	60.00%	60.00%
Loan to value ratio, maximum	70.00%	70.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 28	$ 92
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	72	18
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	18	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	85
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	77	37
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	37	0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 232	$ 232
70% - 80%
Schedule of Loans by Loan to Value Ratio [Line Items]
Loan to value ratio, minimum	70.00%	70.00%
Loan to value ratio, maximum	80.00%	80.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 0	$ 0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	20	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	3	17
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	17	0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 40	$ 17
80% and above
Schedule of Loans by Loan to Value Ratio [Line Items]
Loan to value ratio, minimum	80.00%	80.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 0	$ 0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	2	2
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 2	$ 2

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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