Number of segments in which the loan portfolio is segregated.

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- Definition

Percentage of allowance for credit loss to total financing receivable outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Number 229
-Section 1405
-Paragraph a
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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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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
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Amount, after allowance for credit loss, of accrued interest on financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
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Indicates line item in statement of financial position that includes accrued interest, after allowance for credit loss, on financing receivable.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

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

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

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BANK LOANS, NET, Held for Sale and Held for Investment (Details) $ in Millions	Dec. 31, 2025 USD ($) portfolio_segment	Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)
Receivables [Abstract]
Number of loan portfolio segments \| portfolio_segment	6
Nonrelated party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	$ 53,883	$ 52,019
Allowance for credit losses	(440)	(452)
Loans, net	$ 53,443	$ 51,567
ACL as a % of total loans held for investment	0.82%	0.88%
Accrued interest receivable on bank loans (included in “Other receivables, net”)	$ 213	$ 216
Accrued interest receivable on bank loans, location	Other receivables, net	Other receivables, net
Total loans held for investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	$ 53,715	$ 51,603
Allowance for credit losses	(440)	(452)	$ (452)	$ (457)
Total loans held for investment \| Nonrelated party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	53,715	51,603
Held for sale loans \| Nonrelated party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	168	416
SBL
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	21,667	19,775
SBL \| Total loans held for investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	21,667	19,775
Allowance for credit losses	(7)	(8)	(5)	(6)
SBL \| Total loans held for investment \| Nonrelated party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	21,667	19,775
C&I loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	10,801	10,777
C&I loans \| Total loans held for investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	10,801	10,777
Allowance for credit losses	(146)	(148)	(176)	(173)
C&I loans \| Total loans held for investment \| Nonrelated party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	10,801	10,777
CRE loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	7,753	7,840
CRE loans \| Total loans held for investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	7,753	7,840
Allowance for credit losses	(176)	(182)	(177)	(188)
CRE loans \| Total loans held for investment \| Nonrelated party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	7,753	7,840
REIT loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	1,779	1,690
REIT loans \| Total loans held for investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	1,779	1,690
Allowance for credit losses	(48)	(52)	(27)	(23)
REIT loans \| Total loans held for investment \| Nonrelated party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	1,779	1,690
Residential mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	10,567	10,295
Residential mortgage loans \| Total loans held for investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	10,567	10,295
Allowance for credit losses	(62)	(61)	(65)	(65)
Residential mortgage loans \| Total loans held for investment \| Nonrelated party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	10,567	10,295
Tax-exempt loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	1,148	1,226
Tax-exempt loans \| Total loans held for investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	1,148	1,226
Allowance for credit losses	(1)	(1)	$ (2)	$ (2)
Tax-exempt loans \| Total loans held for investment \| Nonrelated party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale and investment	$ 1,148	$ 1,226