v3.26.1
BANK LOANS, NET, Past Due, Nonaccrual, and Modified Loans and Collateral Dependent Loans (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Sep. 30, 2025
Financing Receivable, Past Due [Line Items]    
Performing nonaccrual loans $ 75 $ 109
SBL    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 23,007 19,775
C&I loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 10,489 10,777
CRE loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 7,972 7,840
REIT loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 1,695 1,690
Residential mortgage loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 10,789 10,295
Tax-exempt loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 1,123 1,226
Total loans held for investment    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 55,075 51,603
Nonaccrual with allowance 144 159
Nonaccrual with no allowance 38 27
Total loans held for investment | SBL    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 23,007 19,775
Nonaccrual with allowance 0 0
Nonaccrual with no allowance 0 0
Total loans held for investment | C&I loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 10,489 10,777
Nonaccrual with allowance 31 39
Nonaccrual with no allowance 19 5
Total loans held for investment | CRE loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 7,972 7,840
Nonaccrual with allowance 113 101
Nonaccrual with no allowance 8 9
Total loans held for investment | REIT loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 1,695 1,690
Nonaccrual with allowance 0 19
Nonaccrual with no allowance 0 0
Total loans held for investment | Residential mortgage loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 10,789 10,295
Nonaccrual with allowance 0 0
Nonaccrual with no allowance 11 13
Total loans held for investment | Tax-exempt loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 1,123 1,226
Nonaccrual with allowance 0 0
Nonaccrual with no allowance 0 0
Total loans held for investment | Total past due and accruing    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 8 7
Total loans held for investment | Total past due and accruing | SBL    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 6 1
Total loans held for investment | Total past due and accruing | C&I loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 1
Total loans held for investment | Total past due and accruing | CRE loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | Total past due and accruing | REIT loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | Total past due and accruing | Residential mortgage loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 2 5
Total loans held for investment | Total past due and accruing | Tax-exempt loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | 30-89 days and accruing    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 8 7
Total loans held for investment | 30-89 days and accruing | SBL    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 6 1
Total loans held for investment | 30-89 days and accruing | C&I loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 1
Total loans held for investment | 30-89 days and accruing | CRE loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | 30-89 days and accruing | REIT loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | 30-89 days and accruing | Residential mortgage loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 2 5
Total loans held for investment | 30-89 days and accruing | Tax-exempt loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | 90 days or more and accruing    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | 90 days or more and accruing | SBL    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | 90 days or more and accruing | C&I loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | 90 days or more and accruing | CRE loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | 90 days or more and accruing | REIT loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | 90 days or more and accruing | Residential mortgage loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | 90 days or more and accruing | Tax-exempt loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 0 0
Total loans held for investment | Current and accruing    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 54,885 51,410
Total loans held for investment | Current and accruing | SBL    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 23,001 19,774
Total loans held for investment | Current and accruing | C&I loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 10,439 10,732
Total loans held for investment | Current and accruing | CRE loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 7,851 7,730
Total loans held for investment | Current and accruing | REIT loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 1,695 1,671
Total loans held for investment | Current and accruing | Residential mortgage loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment 10,776 10,277
Total loans held for investment | Current and accruing | Tax-exempt loans    
Financing Receivable, Past Due [Line Items]    
Total loans held for investment $ 1,123 $ 1,226