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v3.22.2.2

Notes Payable - Principal Amounts (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Sep. 30, 2021
--- | --- | ---
Debt Instrument [Line Items] |  |
Notes payable, carrying value | $ 6,066.9 | $ 5,412.4
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months | 2,500.0 |
Long-term Debt, Maturities, Repayments of Principal in Year Two | 12.9 |
Long-term Debt, Maturities, Repayments of Principal in Year Three | 500.4 |
Long-term Debt, Maturities, Repayments of Principal in Year Four | 1,700.0 |
Long-term Debt, Maturities, Repayments of Principal in Year Five | 600.4 |
Long-Term Debt, Maturity, after Year Five | 800.0 |
Intersegment Eliminations [Member] |  |
Debt Instrument [Line Items] |  |
Notes payable, carrying value | 0.0 | (0.7)
Home Building Consolidated |  |
Debt Instrument [Line Items] |  |
Line of credit, amount outstanding | 0.0 | 0.0
Notes payable, carrying value | 2,942.6 | 3,213.3
Unamortized Debt Issuance Expense | 12.2 | 16.5
Home Building Consolidated | Secured Debt [Member] |  |
Debt Instrument [Line Items] |  |
Notes payable, carrying value | $ 156.6 | 82.2
Home Building Consolidated | Senior Note Member Twenty Five [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes, stated interest rate | 4.375% |
Notes payable, carrying value | $ 0.0 | 349.6
Home Building Consolidated | Senior Note Twenty Seven [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes, stated interest rate | 4.75% |
Notes payable, carrying value | $ 299.9 | 299.5
Home Building Consolidated | SeniorNoteTwentyEight [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes, stated interest rate | 5.75% |
Notes payable, carrying value | $ 399.6 | 399.1
Home Building Consolidated | SeniorNoteFortyTwo [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes, stated interest rate | 2.50% |
Notes payable, carrying value | $ 498.2 | 497.3
Home Building Consolidated | SeniorNoteFortyFour |  |
Debt Instrument [Line Items] |  |
Senior notes, stated interest rate | 2.60% |
Notes payable, carrying value | $ 497.1 | 496.2
Home Building Consolidated | SeniorNoteFortySIx |  |
Debt Instrument [Line Items] |  |
Senior notes, stated interest rate | 1.30% |
Notes payable, carrying value | $ 595.5 | 594.5
Home Building Consolidated | Senior Note Forty Five [Member] |  |
Debt Instrument [Line Items] |  |
Senior notes, stated interest rate | 1.40% |
Notes payable, carrying value | $ 495.7 | 494.9
Forestar Group [Member] |  |
Debt Instrument [Line Items] |  |
Line of credit, amount outstanding | 0.0 | 0.0
Notes payable, carrying value | 706.0 | 704.5
Unamortized Debt Issuance Expense | 6.5 | 8.0
Forestar Group [Member] | Secured Debt [Member] |  |
Debt Instrument [Line Items] |  |
Notes payable, carrying value | $ 12.5 | 12.5
Forestar Group [Member] | Senior Note Forty Seven |  |
Debt Instrument [Line Items] |  |
Senior notes, stated interest rate | 3.85% |
Notes payable, carrying value | $ 396.5 | 395.5
Forestar Group [Member] | Senior Note Member Forty Three |  |
Debt Instrument [Line Items] |  |
Senior notes, stated interest rate | 5.00% |
Notes payable, carrying value | $ 297.0 | 296.5
Financial Services [Member] |  |
Debt Instrument [Line Items] |  |
Notes payable, carrying value | 1,618.3 | 1,494.6
Rental |  |
Debt Instrument [Line Items] |  |
Line of credit, amount outstanding | 800.0 | 0.0
Notes payable, carrying value | $ 800.0 | $ 0.0

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