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v3.22.1

Notes Payable (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2022 | Mar. 01, 2022 | Sep. 30, 2021 | Jun. 30, 2020 | Sep. 30, 2019
Estimate of Fair Value Measurement [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable, Fair value | $ 5,400.0 | $ 5,400.0 |  | $ 5,500.0 |  |
Letters of Credit Outstanding, Amount | 236.1 | 236.1 |  |  |  |
Notes payable | 5,570.0 | 5,570.0 |  | 5,412.4 |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable, Fair value | 3,700.0 | 3,700.0 |  | 3,900.0 |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable, Fair value | 1,700.0 | 1,700.0 |  | 1,600.0 |  |
Intersegment Eliminations [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable | (0.5) | (0.5) |  | (0.7) |  |
Forestar Group [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Unamortized Debt Issuance Expense | 7.2 | 7.2 |  | 8.0 |  |
Notes payable | 705.3 | 705.3 |  | 704.5 |  |
Financial Services [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity | 1,600.0 | 1,600.0 |  |  |  |
Pledged Financial Instruments, Not Separately Reported, Loans Receivable, for Repurchase Agreements | 2,200.0 | 2,200.0 |  |  |  |
Participating Mortgage Loans, Mortgage Obligations, Amount | 2,200.0 | $ 2,200.0 |  |  |  |
Advance Pay Downs on Mortgage Repurchase Facility | $ 619.9 |  |  |  |  |
Assets Sold under Agreements to Repurchase, Interest Rate | 1.90% | 1.90% |  |  |  |
Notes payable | $ 1,578.9 | $ 1,578.9 |  | 1,494.6 |  |
Financial Services [Member] | Maximum [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity | 2,100.0 | 2,100.0 |  |  |  |
Forestar Group [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity | 410.0 | 410.0 |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 600.0 | $ 600.0 |  |  |  |
Letters of credit, sublimit borrowing capacity, as a percentage | 50.00% | 50.00% |  |  |  |
Revolving credit facility | $ 0.0 | $ 0.0 |  | 0.0 |  |
Letters of Credit Outstanding, Amount | 60.5 | 60.5 |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity | 349.5 | 349.5 |  |  |  |
Authorized Repurchase Of Debt Securities |  |  |  |  | $ 30.0 |
Debt Repurchase Authorization Remaining | 30.0 | 30.0 |  |  |  |
Letter of Credit, Maximum Borrowing Capacity (in dollars) | 100.0 | 100.0 |  |  |  |
Notes payable | 705.3 | 705.3 |  | 704.5 |  |
Home Building Consolidated |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Unamortized Debt Issuance Expense | 14.3 | 14.3 |  | 16.5 |  |
Line of Credit Facility, Current Borrowing Capacity | 2,190.0 | 2,190.0 |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 3,000.0 | $ 3,000.0 |  |  |  |
Letters of credit, sublimit borrowing capacity, as a percentage | 100.00% | 100.00% |  |  |  |
Revolving credit facility | $ 0.0 | $ 0.0 |  | 0.0 |  |
Letters of Credit Outstanding, Amount | 175.6 | 175.6 |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity | 2,000.0 | 2,000.0 |  |  |  |
Authorized Repurchase Of Debt Securities |  |  |  |  |  | $ 500.0
Debt Repurchase Authorization Remaining | 500.0 | 500.0 |  |  |  |
Notes payable | 3,285.8 | 3,285.8 |  | 3,213.3 |  |
Proceeds from Lines of Credit |  | 750.0 |  |  |  |
Repayments of Lines of Credit |  | 750.0 |  |  |  |
Rental |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity | 750.0 | 750.0 | $ 625.0 |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 1,250.0 | $ 1,250.0 |  |  |  |
Letters of credit, sublimit borrowing capacity, as a percentage | 50.00% | 50.00% |  |  |  |
Revolving credit facility | $ 0.0 | $ 0.0 |  | 0.0 |  |
Line of Credit Facility, Remaining Borrowing Capacity | 486.0 | 486.0 |  |  |  |
Letter of Credit, Maximum Borrowing Capacity (in dollars) | 100.0 | 100.0 |  |  |  |
Notes payable | 0.0 | 0.0 |  | 0.0 |  |
4.375% senior notes due 2022 [Member] | Home Building Consolidated |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable | $ 349.8 | $ 349.8 |  | 349.6 |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.375% | 4.375% |  |  |  |
4.75% senior notes due 2023 [Member] | Home Building Consolidated |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable | $ 299.7 | $ 299.7 |  | 299.5 |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.75% | 4.75% |  |  |  |
5.75% senior notes due 2023 [Member] | Home Building Consolidated |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable | $ 399.3 | $ 399.3 |  | 399.1 |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.75% | 5.75% |  |  |  |
SeniorNoteFortyTwo [Member] | Home Building Consolidated |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable | $ 497.7 | $ 497.7 |  | 497.3 |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.50% | 2.50% |  |  |  |
SeniorNoteFortyFour | Home Building Consolidated |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable | $ 496.7 | $ 496.7 |  | 496.2 |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.60% | 2.60% |  |  |  |
Senior Note Forty Six | Home Building Consolidated |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable | $ 595.0 | $ 595.0 |  | 594.5 |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.30% | 1.30% |  |  |  |
Senior Note Forty Five | Home Building Consolidated |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable | $ 495.3 | $ 495.3 |  | 494.9 |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.40% | 1.40% |  |  |  |
Senior Note Member Forty Six | Forestar Group [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable | $ 396.0 | $ 396.0 |  | 395.5 |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.85% | 3.85% |  |  |  |
Senior Note Member Forty Three | Forestar Group [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable | $ 296.8 | $ 296.8 |  | 296.5 |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.00% | 5.00% |  |  |  |
Secured Debt [Member] | Forestar Group [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable | $ 12.5 | $ 12.5 |  | 12.5 |  |
Secured Debt [Member] | Home Building Consolidated |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes payable | $ 152.3 | $ 152.3 |  | $ 82.2 |  |

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