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v3.26.1

Notes Payable - Financial Services Textuals (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Mar. 31, 2026 | Sep. 30, 2025
Debt Instrument [Line Items] |  |
Notes payable | $ 6,563.8 | $ 5,965.5
Financial Services [Member] |  |
Debt Instrument [Line Items] |  |
Notes payable | 1,478.2 | 1,408.3
Commitments to Extend Credit | Financial Services [Member] |  |
Debt Instrument [Line Items] |  |
Line of Credit Facility, Current Borrowing Capacity | $ 1,400.0 |
Line of Credit Facility, Expiration Date | May 06, 2026 |
Line of Credit Facility, Maximum Borrowing Capacity | $ 2,000.0 |
Notes payable | $ 1,062.1 | 1,103.5
Assets Sold under Agreements to Repurchase, Interest Rate | 5.40% |
Deposit Liabilities, Collateral Issued, Financial Instruments | $ 2,310.0 |
Participating Mortgage Loans, Mortgage Obligations, Amount | 2,260.0 |
Warehouse Agreement Borrowings | Financial Services [Member] |  |
Debt Instrument [Line Items] |  |
Line of Credit Facility, Current Borrowing Capacity | 500.0 |
Notes payable | $ 416.1 | $ 304.8
Assets Sold under Agreements to Repurchase, Interest Rate | 4.90% |
Deposit Liabilities, Collateral Issued, Financial Instruments | $ 464.6 |
Participating Mortgage Loans, Mortgage Obligations, Amount | $ 430.7 |

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