Investments - Loans by Debt Service Coverage Ratio (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
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	$ 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
Greater than 1.5x
Schedule of Loans by Debt Service Coverage Ratio [Line Items]
Loans Receivable, Debt Service Coverage Ratio, Minimum	150.00%	150.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 129	$ 628
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	613	138
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	143	128
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	82	299
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	311	254
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	1,757	1,743
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 3,035	$ 3,190
1.25x - 1.5x
Schedule of Loans by Debt Service Coverage Ratio [Line Items]
Loans Receivable, Debt Service Coverage Ratio, Minimum	125.00%	125.00%
Loans Receivable, Debt Service Coverage Ratio, Maximum	150.00%	150.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 118	$ 131
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	105	107
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	55	14
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	47	97
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	79	19
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	327	342
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 731	$ 710
1.0x - 1.25x
Schedule of Loans by Debt Service Coverage Ratio [Line Items]
Loans Receivable, Debt Service Coverage Ratio, Minimum	100.00%	100.00%
Loans Receivable, Debt Service Coverage Ratio, Maximum	125.00%	125.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 104	$ 55
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	49	37
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	57	65
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	3	42
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	30	41
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	213	203
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 456	$ 443
Less than 1.0x
Schedule of Loans by Debt Service Coverage Ratio [Line Items]
Loans Receivable, Debt Service Coverage Ratio, Maximum	100.00%	100.00%
Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year	$ 20	$ 14
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year	12	5
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year	24	2
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year	4	84
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year	59	76
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year	137	78
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 256	$ 259

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
-Section 50
-Paragraph 5
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-Publisher FASB
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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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