Investments - Loans by Loan to Value (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 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	$ 371	$ 828
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	779	287
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	279	209
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	136	522
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	479	390
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	2,434	2,366
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 4,478	$ 4,602
0% - 50%
Schedule of Loans by Loan to Value Ratio [Line Items]
Loans Receivable, Loan to Value Ratio, Minimum	0.00%	0.00%
Loans Receivable, Loan to Value Ratio, Maximum	50.00%	50.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 119	$ 337
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	300	150
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	157	72
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	53	218
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	217	189
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	2,147	2,225
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 2,993	$ 3,191
50% - 60%
Schedule of Loans by Loan to Value Ratio [Line Items]
Loans Receivable, Loan to Value Ratio, Minimum	50.00%	50.00%
Loans Receivable, Loan to Value Ratio, Maximum	60.00%	60.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 113	$ 406
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	408	126
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	111	137
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	83	221
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	196	151
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	239	139
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 1,150	$ 1,180
60% - 70%
Schedule of Loans by Loan to Value Ratio [Line Items]
Loans Receivable, Loan to Value Ratio, Minimum	60.00%	60.00%
Loans Receivable, Loan to Value Ratio, Maximum	70.00%	70.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 102	$ 85
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	55	11
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	11	0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	0	83
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	63	35
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	31	0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 262	$ 214
70% - 80%
Schedule of Loans by Loan to Value Ratio [Line Items]
Loans Receivable, Loan to Value Ratio, Minimum	70.00%	70.00%
Loans Receivable, Loan to Value Ratio, Maximum	80.00%	80.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 37	$ 0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	16	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	15
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	15	0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 71	$ 15
Debt-to-Value Ratio, 80 to 100 Percent
Schedule of Loans by Loan to Value Ratio [Line Items]
Loans Receivable, 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
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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