Investments (excluding Consolidated Investment Entities) - Loans by Debt Service Coverage Ratio (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Schedule of Loans by Debt Service Coverage Ratio [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 468	$ 968
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	919	345
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	336	293
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	191	588
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	532	466
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	3,038	2,948
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	5,484	5,608
>1.5x
Schedule of Loans by Debt Service Coverage Ratio [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	188	736
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	725	161
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	162	168
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	118	337
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	354	313
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	2,233	2,207
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	3,780	3,922
>1.25x - 1.5x
Schedule of Loans by Debt Service Coverage Ratio [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	150	150
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	119	129
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	76	34
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	65	116
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	86	20
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	388	402
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	884	851
>1.0x - 1.25x
Schedule of Loans by Debt Service Coverage Ratio [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	111	67
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	63	49
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	67	89
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	3	48
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	32	48
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	245	245
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	521	546
Less than 1.0x
Schedule of Loans by Debt Service Coverage Ratio [Line Items]
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	19	15
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	12	6
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	31	2
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	5	87
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	60	85
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	172	94
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 299	$ 289

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
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/exampleRef
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