CORPORATE AND NON-RECOURSE BORROWINGS - Schedule of Corporate and Non-Recourse Borrowings (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2026	Dec. 31, 2025
Non-recourse borrowings
Line of Credit Facility [Line Items]
Principal Balance	$ 7,099	$ 4,927
Carrying Amount	6,978	4,857
Total corporate borrowings \| Credit facilities
Line of Credit Facility [Line Items]
Principal Balance	2,652	628
Carrying Amount	2,652	628
Term loan Due April 2031 \| Credit facilities
Line of Credit Facility [Line Items]
Principal Balance	1,989	0
Carrying Amount	$ 1,989	0
364-day revolving credit facility due October 2026 \| Credit facilities
Line of Credit Facility [Line Items]
Debt term	364 days
Collateral pledged	$ 588	761
364-day revolving credit facility due October 2026 \| Credit facilities \| Investment funds
Line of Credit Facility [Line Items]
Collateral pledged	235	260
364-day revolving credit facility due October 2026 \| Credit facilities \| Cash and cash equivalents
Line of Credit Facility [Line Items]
Collateral pledged	4	9
364-day revolving credit facility due October 2026 \| Credit facilities \| Real estate partnerships
Line of Credit Facility [Line Items]
Collateral pledged	349	492
364-day revolving credit facility due October 2026 \| Credit facilities \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Carrying Amount	1,000	1,000
Margin loan Due April 2027 \| Credit facilities
Line of Credit Facility [Line Items]
Principal Balance	1,000	0
Carrying Amount	1,000	0
Collateral pledged	2,900
Term Loan Maturing In May 2027 \| Credit facilities \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Principal Balance	100	100
Carrying Amount	$ 99	98
5.00% senior notes due June 2027 \| Senior unsecured notes \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Fixed interest rate	5.00%
Principal Balance	$ 500	500
Carrying Amount	494	490
Term loan due September 2028 \| Credit facilities \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Principal Balance	750	750
Carrying Amount	$ 749	749
5.75% senior notes due October 2029 \| Senior unsecured notes \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Fixed interest rate	5.75%
Principal Balance	$ 600	600
Carrying Amount	$ 597	596
6.14% senior notes due June 2032 \| Senior unsecured notes \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Fixed interest rate	6.14%
Principal Balance	$ 500	500
Carrying Amount	$ 497	497
6.00% senior notes due July 2035 \| Senior unsecured notes \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Fixed interest rate	6.00%
Principal Balance	$ 700	700
Carrying Amount	$ 692	692
5.00% subordinated notes due June 2047 \| Subordinated notes \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Fixed interest rate	5.00%
Principal Balance	$ 100	100
Carrying Amount	$ 84	84
7.00% junior subordinated notes due December 2055 \| Junior subordinated notes \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Fixed interest rate	7.00%
Principal Balance	$ 500	500
Carrying Amount	494	494
Junior subordinated debentures \| Junior subordinated notes \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Principal Balance	266	265
Carrying Amount	$ 247	245
5.00% perpetual restricted notes \| Subordinated notes \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Fixed interest rate	5.00%
Principal Balance	$ 431	0
Carrying Amount	375	0
Subordinated notes \| Subordinated notes \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Principal Balance	1,035	0
Carrying Amount	1,033	$ 0
Subordinated notes \| Subordinated notes \| Non-recourse borrowings \| Minimum
Line of Credit Facility [Line Items]
Fixed interest rate		6.50%
Subordinated notes \| Subordinated notes \| Non-recourse borrowings \| Maximum
Line of Credit Facility [Line Items]
Fixed interest rate		9.00%
Revolving credit facilities \| Bilateral Revolving Credit Facilities \| Credit facilities
Line of Credit Facility [Line Items]
Principal Balance	663	$ 628
Carrying Amount	663	628
Carrying Amount	$ 2,300	1,300
Revolving credit facilities \| 364-day revolving credit facility due October 2026 \| Credit facilities \| Non-recourse borrowings
Line of Credit Facility [Line Items]
Debt term	364 days
Principal Balance	$ 617	912
Carrying Amount	$ 617	$ 912

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount of assets pledged to secure a debt instrument.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Period between issuance and maturity of debt instrument, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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