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Commitments and Contingencies (Details Textual) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Commitments and Contingencies [Abstract] |  |  |  |
Surety bonds | $ 1,000.0 |  |  |
Outstanding letters of credit | 107.1 |  |  |
Homebuilding [Member] |  |  |  |
Commitments and Contingencies [Abstract] |  |  |  |
Liabilities for various claims, complaints and other legal actions | 458.9 | $ 457.6 | $ 451.0 | $ 456.9
Expenses related to legal claims | 17.3 | 11.3 |  |
Estimated insurance recoveries related to legal claims | 127.8 | $ 137.7 | $ 126.5 |
Earnest money deposits | 88.7 |  |  |
Remaining purchase price of land under option contracts | $ 2,500.0 |  |  |
Construction defect portion of loss contingency accrual | 99.00% |  | 99.00% |
Cash Deposits [Member] | Homebuilding [Member] |  |  |  |
Commitments and Contingencies [Abstract] |  |  |  |
Earnest money deposits | $ 84.0 |  |  |
Promissory Notes and Surety Bonds [Member] | Homebuilding [Member] |  |  |  |
Commitments and Contingencies [Abstract] |  |  |  |
Earnest money deposits | 4.7 |  |  |
Line of Credit [Member] | Homebuilding [Member] |  |  |  |
Commitments and Contingencies [Abstract] |  |  |  |
Outstanding letters of credit | 103.9 |  |  |
Letter of Credit Two [Member] |  |  |  |
Commitments and Contingencies [Abstract] |  |  |  |
Outstanding letters of credit | 3.2 |  |  |
Option Contracts Subject to Specific Performance Clauses [Member] | Homebuilding [Member] |  |  |  |
Commitments and Contingencies [Abstract] |  |  |  |
Remaining purchase price of land under option contracts | 37.0 |  |  |
Variable Interest Entity, Not Primary Beneficiary [Member] | Homebuilding [Member] |  |  |  |
Commitments and Contingencies [Abstract] |  |  |  |
Earnest money deposits | $ 83.2 |  | $ 74.4 |

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- Definition Commitments and contingencies. + References No definition available. + Details
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- Definition The portion of the total reserve for legal claims that relates to the entity's construction defect matters, expressed as a percentage. + References No definition available. + Details
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- Definition A deposit made by a purchaser of real estate to evidence good faith. It is customary for a buyer to give the seller earnest money at the time a sales contract is signed. The earnest money generally is credited to the down payment at closing, which is applied at closing as a component of payment against the purchase price. + References No definition available. + Details
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- Definition Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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- Definition The noncurrent portion of the carrying value as of the balance sheet date of a type of municipal bond typically used to fund a development project. Also called special assessment limited liability bond, special district bond, special purpose bond, special tax bond and community development obligation. Interest owed to lenders is paid by taxes levied on the community benefiting from the particular bond-funded project. For example, if a bond of this sort was issued to pay for sidewalks to be repaved in a certain community, an additional tax would be levied on homeowners in the area benefiting from this project. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Article 5 -Subsection 20 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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