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v3.19.2

Notes Payable - Narrative (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Aug. 01, 2018 | Sep. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2019 | Sep. 30, 2018
Debt Instrument [Line Items] |  |  |  |  |
Document Period End Date |  |  |  | Jun. 30, 2019 |
Notes payable |  |  |  | $ 3,450,600,000 | $ 3,203,500,000
Outstanding letters of credit |  |  |  | 162,300,000 |
Restricted Cash and Cash Equivalents |  |  |  | 21,100,000 | 32,900,000
Home Building [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt issuance costs |  |  |  | 6,100,000 | 8,500,000
Notes payable |  |  |  | 2,191,300,000 | 2,445,900,000
Borrowing capacity on revolving credit facility |  |  |  | 1,325,000,000 |
Maximum borrowing capacity on revolving credit facility |  |  |  | $ 1,900,000,000 |
Letters of credit, sublimit borrowing capacity, as a percentage |  |  |  | 50.00% |
Proceeds from revolving credit facility |  |  |  | $ 2,100,000,000 |
Repayments of revolving credit facility |  |  |  | 1,950,000,000 |
Borrowings outstanding on revolving credit facility |  |  |  | $ 150,000,000.0 | 0
Line of Credit Facility, Interest Rate at Period End |  |  |  | 3.60% |
Authorized repurchase of debt securities | $ 500,000,000 |  |  |  |
Debt repurchase program, remaining authorized repurchase amount |  |  |  | $ 500,000,000 |
Restricted Cash and Cash Equivalents |  |  |  | 9,800,000 | 8,600,000
Home Building [Member] | Senior Note Twenty Nine [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Notes payable |  |  |  | $ 0 | 499,600,000
Maturities of Senior Debt |  |  | $ 500,000,000 |  |
Stated interest rate |  |  |  | 3.75% |
Financial Services [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Notes payable |  |  |  | $ 796,500,000 | 637,700,000
Borrowing capacity on revolving credit facility |  |  |  | 900,000,000 |
Maximum borrowing capacity on revolving credit facility |  |  |  | 1,200,000,000 |
Mortgage loans held for sale pledged under repurchase agreement |  |  |  | 906,200,000 |
Mortgage loans held for sale pledged under repurchase agreement, collateral value |  |  |  | $ 874,700,000 |
Interest rate on mortgage repurchase facility |  |  |  | 4.10% |
Forestar Group [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Notes payable |  |  |  | $ 458,900,000 | 111,700,000
Borrowing capacity on revolving credit facility |  |  |  | 380,000,000 |
Letter of Credit, Maximum Borrowing Capacity (in dollars) |  |  |  | 100,000,000 |
Maximum borrowing capacity on revolving credit facility |  |  |  | $ 570,000,000 |
Letters of credit, sublimit borrowing capacity, as a percentage |  |  |  | 50.00% |
Restricted Cash and Cash Equivalents |  |  |  | $ 200,000 | 16,200,000
Forestar Group [Member] | 3.75% convertible senior notes due 2020 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated interest rate |  |  |  | 3.75% |
Forestar Group [Member] | Senior Note Member Forty One [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt issuance costs |  |  |  | $ 6,500,000 |
Stated interest rate |  |  |  | 8.00% |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  | 8.50% |
Debt Instrument, Face Amount |  |  |  | $ 350,000,000 |
Forestar Consolidated [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Notes payable |  |  |  | 462,800,000 | 119,900,000
Proceeds from revolving credit facility |  |  |  | 85,000,000 |
Repayments of revolving credit facility |  |  |  | 85,000,000 |
Borrowings outstanding on revolving credit facility |  |  |  | 0 | 0
Forestar Consolidated [Member] | 3.75% convertible senior notes due 2020 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Notes payable |  |  |  | 119,300,000 | 119,900,000
Forestar Consolidated [Member] | Senior Note Member Forty One [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Notes payable |  |  |  | 343,500,000 | 0
Standby Letters of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Outstanding letters of credit |  |  |  | 1,700,000 |
Standby Letters of Credit [Member] | Home Building [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Outstanding letters of credit |  |  |  | 1,500,000 |
Standby Letters of Credit [Member] | Forestar Group [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Outstanding letters of credit |  |  |  | 200,000 |
Line of Credit [Member] | Home Building [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Outstanding letters of credit |  |  |  | 138,900,000 |
Line of Credit [Member] | Forestar Group [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Outstanding letters of credit |  |  |  | 21,700,000 |
Maximum [Member] | Financial Services [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing capacity on revolving credit facility |  |  |  | 1,100,000,000 |
Segment Reconciling Items [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Notes payable |  |  |  | 3,900,000 | 8,200,000
Restricted Cash and Cash Equivalents |  |  |  | $ 0 | $ 0
Subsequent Event [Member] | Home Building [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Authorized repurchase of debt securities |  | $ 500,000,000 |  |  |

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