D.R. Horton (DHI) 10-Q 24 Apr 15 2015 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Mar. 31, 2015	Apr. 20, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	HORTON D R INC /DE/
Entity Central Index Key	882184
Document Type	10-Q
Document Period End Date	31-Mar-15
Amendment Flag	FALSE
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	-21
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		366,625,378

Consolidated_Balance_Sheets_Un

Consolidated Balance Sheets (Unaudited) (USD $)	Mar. 31, 2015		Sep. 30, 2014
In Millions, unless otherwise specified
ASSETS
Cash and cash equivalents	$697.70		$661.80
Inventories:
Other assets	514.2		502.7
Total assets	10,713.10		10,202.50
LIABILITIES
Notes payable	3,945.50		3,682.80
Total liabilities	5,292.10		5,082.80
Commitments and contingencies (Note K)
EQUITY
Preferred stock, $.10 par value, 30,000,000 shares authorized, no shares issued	0		0
Common stock, $.01 par value, 1,000,000,000 shares authorized, 373,741,449 shares issued and 366,541,378 shares outstanding at March 31, 2015 and 371,786,765 shares issued and 364,586,694 shares outstanding at September 30, 2014	3.7		3.7
Additional paid-in capital	2,671.30		2,613.70
Retained earnings	2,875.20		2,630.50
Treasury stock, 7,200,071 shares at March 31, 2015 and September 30, 2014, at cost	-134.3		-134.3
Accumulated other comprehensive income	2.2		2.2
Total stockholders' equity	5,418.10		5,115.80
Noncontrolling interests	2.9		3.9
Total equity	5,421		5,119.70
Total liabilities and equity	10,713.10		10,202.50
Homebuilding
ASSETS
Cash and cash equivalents	665.8		632.5
Restricted cash	10.4		10
Inventories:
Construction in progress and finished homes	3,915.80		3,541.30
Residential land and lots - developed and under development	3,928.30		3,800
Land held for development	271.3		332.8
Land held for sale	21.5		26.4
Total inventories	8,136.90	[1]	7,700.50	[1]
Deferred income taxes, net of valuation allowance of $30.9 million and $31.1 million at March 31, 2015 and September 30, 2014, respectively	547.7		565
Property and equipment, net	193.8		190.8
Other assets	442.4		441.1
Goodwill	94.8		94.8
Total assets	10,091.80		9,634.70
LIABILITIES
Accounts Payable and Other Accrued Liabilities	451.9		480.3
Accrued expenses and other liabilities	847.7		875
Notes payable	3,548		3,323.60
Total liabilities	4,847.60		4,678.90
Financial Services
ASSETS
Cash and cash equivalents	31.9		29.3
Inventories:
Mortgage loans held for sale	517.6		476.9
Other assets	71.8		61.6
Total assets	621.3		567.8
LIABILITIES
Accounts payable and other liabilities	47		44.7
Mortgage repurchase facility	397.5		359.2
Total liabilities	$444.50		$403.90
[1]	Homebuilding inventories are the only assets included in the measure of homebuilding segment assets used by the Company’s chief operating decision makers.

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $)	Mar. 31, 2015	Sep. 30, 2014
In Millions, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Valuation allowance for deferred income taxes	$30.90	$31.10
Preferred stock, par value	$0.10	$0.10
Preferred stock, shares authorized	30,000,000	30,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	373,741,449	371,786,765
Common stock, shares outstanding	366,541,378	364,586,694
Treasury stock, shares	7,200,071	7,200,071

Consolidated_Statements_of_Ope

Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $)	3 Months Ended				6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014		Mar. 31, 2015		Mar. 31, 2014
Gross profit:
Income (loss) before income taxes	$230.10	[1]	$201.90	[1]	$450.80	[1]	$391.60	[1]
Income tax expense (benefit)	82.2		70.9		160.4		137.5
Net income	147.9		131		290.4		254.1
Other comprehensive income (loss), net of income tax:
Comprehensive income	147.9		131.3		290.4		254.4
Basic net income per common share (in dollars per share)	$0.40		$0.40		$0.79		$0.79
Net income per common share assuming dilution (in dollars per share)	$0.40		$0.38		$0.79		$0.73
Cash dividends declared per common share (in dollars per share)	$0.06		$0.04		$0.13		$0.04
Homebuilding [Member]
Revenues:
Home sales	2,318.80		1,680		4,559.40		3,310.80
Land/lot sales	19.7		16.6		32.1		21.5
Total revenues	2,338.50		1,696.60		4,591.50		3,332.30
Cost of sales:
Home sales	1,861.90		1,302.80		3,659.90		2,569.50
Land/lot sales	17.6		12.6		28		16.9
Inventory impairments and land option cost write-offs	12.5		4.4		18.6		7.1
Total cost of sales	1,892		1,319.80		3,706.50		2,593.50
Gross profit:
Home sales	456.9		377.2		899.5		741.3
Land/lot sales	2.1		4		4.1		4.6
Inventory impairments and land option cost write-offs	-12.5		-4.4		-18.6		-7.1
Gross profit	446.5		376.8		885		738.8
Selling, general and administrative expense	242.4		187.9		480.4		371.3
Other (income)	-4.5		-2.8		-10.1		-6.1
Income (loss) before income taxes	208.6	[1]	191.7	[1]	414.7	[1]	373.6	[1]
Financial Services [Member]
Gross profit:
Financial Services Revenue	59.5		38.4		109.2		73.3
General and administrative expense	40.7		30.2		78.6		60
Interest and other (income)	-2.7		-2		-5.5		-4.7
Income (loss) before income taxes	21.5	[1]	10.2	[1]	36.1	[1]	18	[1]
Debt Securities [Member]
Other comprehensive income (loss), net of income tax:
Unrealized gain related to debt securities collateralized by residential real estate	$0		$0.30		$0		$0.30
[1]	Expenses maintained at the corporate level consist primarily of interest and property taxes, which are capitalized and amortized to cost of sales or expensed directly, and the expenses related to operating the Company’s corporate office. The amortization of capitalized interest and property taxes is allocated to each segment based on the segment’s cost of sales, while those expenses associated with the corporate office are allocated to each segment based on the segment’s inventory balances.

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
OPERATING ACTIVITIES
Net income	$290.40	$254.10
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	25.4	16.7
Amortization of discounts and fees	2.7	20.8
Stock based compensation expense	22.4	10.8
Income tax benefit from employee stock awards	-6.7	-1.9
Deferred income taxes	17.4	16.7
Inventory impairments and land option cost write-offs	18.6	7.1
Changes in operating assets and liabilities:
Increase in construction in progress and finished homes	-375.6	-336.4
(Increase) decrease in residential land and lots - developed, under development, and held for development	-71.2	-226.8
(Increase) decrease in other assets	-11.1	40.2
Increase in mortgage loans held for sale	-40.7	52.6
Increase (decrease) in accounts payable, accrued expenses and other liabilities	-40.4	-119.7
Net cash used in operating activities	-168.8	-265.8
INVESTING ACTIVITIES
Purchases of property and equipment	-24	-32.8
(Increase) decrease in restricted cash	-0.4	-2
Net principal increase of mortgage loans held in portfolio and real estate owned	-4.9	-1.7
Acquisition of a business	0	-34.5
Net cash used in investing activities	-29.3	-71
FINANCING ACTIVITIES
Proceeds from notes payable	1,350.30	497
Repayment of notes payable	-1,098.30	-163.6
Proceeds from stock associated with certain employee benefit plans	21	29.6
Income tax benefit from employee stock awards	6.7	1.9
Cash dividends paid	-45.7	-12.1
Net cash provided by financing activities	234	352.8
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	35.9	16
Cash and cash equivalents at beginning of period	661.8	977.4
Cash and cash equivalents at end of period	697.7	993.4
Supplemental disclosures of non-cash activities:
Notes payable issued for inventory	8.1	0
Stock issued under Restricted Stock Unit and Performance Unit Plans	$8.30	$5.50

Basis_of_Presentation

Basis of Presentation	6 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION
	The accompanying unaudited, consolidated financial statements include the accounts of D.R. Horton, Inc. and all of its 100% owned, majority-owned and controlled subsidiaries (which are collectively referred to as the Company, unless the context otherwise requires). All significant intercompany accounts, transactions and balances have been eliminated in consolidation. The financial statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. In the opinion of management, all adjustments considered necessary for a fair statement have been included. These financial statements do not include all of the information and notes required by GAAP for complete financial statements and should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s annual report on Form 10-K for the fiscal year ended September 30, 2014.
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ materially from those estimates.
	Reclassifications
	Certain reclassifications have been made in the prior year financial statements to conform to classifications used in the current year. Cash balances of the Company's captive insurance subsidiary, which are expected to be used to fund the captive insurance subsidiary's operations and pay future anticipated legal claims, have been correctly presented within homebuilding cash and cash equivalents rather than homebuilding other assets. These balances were $42.0 million and $40.9 million at March 31, 2014 and September 30, 2013, respectively. The statement of cash flows for the six months ended March 31, 2014, including the statement of cash flows of the Non-Guarantor Subsidiaries as reflected in Note O, have been revised to reflect this correction. As other prior period financial information is presented in future filings, the Company will similarly revise its financial statements in such filings.
	Cash balances of the Company's captive insurance subsidiary, which were $40.5 million and $43.3 million at March 31, 2015 and September 30, 2014, respectively, are included in homebuilding cash and cash equivalents in the consolidated balance sheets.
	Seasonality
	Historically, the homebuilding industry has experienced seasonal fluctuations; therefore, the operating results for the three and six months ended March 31, 2015 are not necessarily indicative of the results that may be expected for the fiscal year ending September 30, 2015 or subsequent periods.
	Variable Interests
	The Company enters into land and lot option purchase contracts to acquire land or lots for the construction of homes. Under these contracts, the Company will fund a stated deposit in consideration for the right, but not the obligation, to purchase land or lots at a future point in time with predetermined terms. Under the terms of many of the option purchase contracts, the option deposits are not refundable in the event the Company elects to terminate the contract.
	Option purchase contracts can result in the creation of a variable interest in the entity holding the land parcel under option. There were no variable interest entities reported in the consolidated balance sheets at March 31, 2015 and September 30, 2014 because the Company determined it did not control the activities that most significantly impact the variable interest entity’s economic performance and it did not have an obligation to absorb losses of or the right to receive benefits from the entity. The maximum exposure to losses related to the Company’s variable interest entities is limited to the amounts of the Company’s related option deposits. At March 31, 2015 and September 30, 2014, the amount of option deposits related to these contracts totaled $60.4 million and $55.7 million, respectively, and are included in homebuilding other assets in the consolidated balance sheets.
	Recent Accounting Pronouncements
	In January 2014, the Financial Accounting Standards Board (FASB) issued ASU 2014-04, “Receivables - Troubled Debt Restructurings by Creditors,” which was revised in August 2014. ASU 2014-04 applies to all creditors who obtain physical possession of residential real estate property collateralizing a consumer mortgage loan in satisfaction of a receivable. The guidance clarifies when an in substance repossession or foreclosure of the property has occurred and helps determine when a creditor should derecognize a loan receivable and recognize real estate property. ASU 2014-14 applies to creditors that hold government-guaranteed mortgage loans and requires that these loans, including those guaranteed by the Federal Housing Administration (FHA) and Veterans Affairs (VA), be derecognized and that a separate other receivable be recognized upon foreclosure if certain conditions are met. Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance expected to be recovered from the guarantor. The guidance in this ASU is effective for the Company beginning October 1, 2015 and is not expected to have a material impact on its consolidated financial position, results of operations or cash flows.
	In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers,” which is a comprehensive new revenue recognition model that will replace most existing revenue recognition guidance. The core principle of this guidance is that an entity should recognize revenue for the transfer of goods or services equal to the amount that it expects to be entitled to receive for those goods or services. The guidance is expected to be effective for the Company beginning October 1, 2018 and allows for full retrospective or modified retrospective methods of adoption. The Company is currently evaluating the impact of this guidance on its consolidated financial position, results of operations and cash flows.
	In June 2014, the FASB issued ASU 2014-12, “Compensation - Stock Compensation,” which states that a performance target in a share-based payment that affects vesting and that could be achieved after the requisite service period should be accounted for as a performance condition. The guidance is effective for the Company beginning October 1, 2016 and is not expected to have a material impact on its consolidated financial position, results of operations or cash flows.
	In August 2014, the FASB issued ASU 2014-15, “Presentation of Financial Statements - Going Concern,” which provides guidance about management's responsibility to evaluate whether there is substantial doubt about the entity's ability to continue as a going concern and to provide related footnote disclosures. This guidance is intended to reduce the diversity in the timing and content of footnote disclosures. The guidance is effective for the Company beginning with its fiscal year ending September 30, 2017 and is not expected to have any impact on its consolidated financial position, results of operations or cash flows.
	In February 2015, the FASB issued ASU 2015-02, “Consolidation,” which changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. The guidance is effective for the Company beginning October 1, 2016 and is not expected to have a material impact on its consolidated financial position, results of operations or cash flows.
	In April 2015, the FASB issued ASU 2015-03, “Interest - Imputation of Interest,” which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability. This new guidance is a change from the current treatment of recording debt issuance costs as an asset representing a deferred charge, and is consistent with the accounting treatment for debt discounts. The guidance, which requires retrospective application, is effective for the Company beginning October 1, 2016, but early adoption is allowed. The Company is currently evaluating this guidance, which will not have a material impact on its consolidated financial position, results of operations or cash flows.

Segment_Information

Segment Information	6 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION
	The Company is a national homebuilder that is primarily engaged in the acquisition and development of land and the construction and sale of residential homes, with operations in 79 markets in 27 states across the United States. The Company designs, builds and sells single-family detached homes on lots it develops and on fully developed lots purchased ready for home construction. To a lesser extent, the Company also builds and sells attached homes, such as town homes, duplexes, triplexes and condominiums. Periodically, the Company sells land and lots to other developers and homebuilders where it has excess land and lot positions. The homebuilding segments generate most of their revenues from the sale of completed homes, and to a lesser extent from the sale of land and lots.
	The Company’s financial services segment provides mortgage financing and title agency services primarily to the Company’s homebuilding customers. The Company sells substantially all of the mortgages it originates and the related servicing rights to third-party purchasers. The financial services segment generates its revenues from originating and selling mortgages and collecting fees for title insurance agency and closing services.
	The Company’s 38 homebuilding operating divisions and its financial services operation are its operating segments. The homebuilding operating segments are aggregated into six reporting segments and the financial services operating segment is its own reporting segment. The Company’s reportable homebuilding segments are: East, Midwest, Southeast, South Central, Southwest and West. These reporting segments have homebuilding operations located in the following states:
		East:		Delaware, Georgia (Savannah only), Maryland, New Jersey, North Carolina, Pennsylvania, South Carolina and Virginia
		Midwest:		Colorado, Illinois, Indiana and Minnesota
		Southeast:		Alabama, Florida, Georgia, Mississippi and Tennessee
		South Central:		Louisiana, Oklahoma and Texas
		Southwest:		Arizona and New Mexico
		West:		California, Hawaii, Nevada, Oregon, Utah and Washington
	The accounting policies of the reporting segments are described throughout Note A included in the Company’s annual report on Form 10-K for the fiscal year ended September 30, 2014. Financial information relating to the Company's reporting segments is as follows:
			Three Months Ended				Six Months Ended
			March 31,				March 31,
			2015		2014		2015		2014
			(In millions)
	Revenues
	Homebuilding revenues:
	East		$	280.7	$	203.2	$	579.5	$	393.3
	Midwest		145		99.9		274.9		205.7
	Southeast		646.1		471.3		1,265.50		918.7
	South Central		628.2		430.4		1,207.90		851.5
	Southwest		70.9		63.1		146.3		133.8
	West		567.6		428.7		1,117.40		829.3
	Homebuilding revenues		2,338.50		1,696.60		4,591.50		3,332.30
	Financial services revenues		59.5		38.4		109.2		73.3
	Total revenues		$	2,398.00	$	1,735.00	$	4,700.70	$	3,405.60
	Inventory Impairments
	East		$	—	$	—	$	—	$	—
	Midwest		—		—		—		—
	Southeast		7.3		2.1		7.3		2.1
	South Central		0.7		—		0.7		—
	Southwest		—		—		—		—
	West		0.1		0.2		4		0.2
	Total inventory impairments		$	8.1	$	2.3	$	12	$	2.3
	Income Before Income Taxes (1)
	Homebuilding pre-tax income:
	East		$	13	$	14.2	$	39.4	$	25.7
	Midwest		10.2		9.1		15		19.1
	Southeast		58.7		52.2		116.7		103.7
	South Central		65.1		46.6		126.2		89
	Southwest		1.2		5.5		3.1		11.5
	West		60.4		64.1		114.3		124.6
	Homebuilding pre-tax income		208.6		191.7		414.7		373.6
	Financial services pre-tax income		21.5		10.2		36.1		18
	Income before income taxes		$	230.1	$	201.9	$	450.8	$	391.6
	________________
	-1	Expenses maintained at the corporate level consist primarily of interest and property taxes, which are capitalized and amortized to cost of sales or expensed directly, and the expenses related to operating the Company’s corporate office. The amortization of capitalized interest and property taxes is allocated to each segment based on the segment’s cost of sales, while those expenses associated with the corporate office are allocated to each segment based on the segment’s inventory balances.
			March 31,		September 30,
			2015		2014
			(In millions)
	Homebuilding Inventories (1)
	East		$	888.5	$	842.7
	Midwest		507		477.6
	Southeast		2,030.40		1,943.00
	South Central		1,927.70		1,742.50
	Southwest		290.6		292.9
	West		2,240.00		2,169.40
	Corporate and unallocated (2)		252.7		232.4
	Total homebuilding inventory		$	8,136.90	$	7,700.50
	________________
	-1	Homebuilding inventories are the only assets included in the measure of homebuilding segment assets used by the Company’s chief operating decision makers.
	-2	Corporate and unallocated consists primarily of capitalized interest and property taxes.

Inventory_Impairments_and_Land

Inventory Impairments and Land Option Cost Write-Offs	6 Months Ended
	Mar. 31, 2015
Inventory Impairments and Land Option Cost Write-Offs [Abstract]
INVENTORY IMPAIRMENTS AND LAND OPTION COST WRITE-OFFS	INVENTORY
	At March 31, 2015, the Company reviewed the performance and outlook for all of its land inventories and communities for indicators of potential impairment and performed detailed impairment evaluations and analyses when necessary. The Company performed detailed impairment evaluations of communities and land inventories with a combined carrying value of $424.2 million and recorded impairment charges of $8.1 million during the second quarter to reduce the carrying value of impaired communities to their estimated fair value. The impairment charges were primarily related to a strategic decision to sell a parcel of land in the Southeast region. During the six months ended March 31, 2015, impairment charges totaled $12.0 million. There were $2.3 million of impairment charges recorded in the three and six months ended March 31, 2014.
	During the three months ended March 31, 2015 and 2014, the Company wrote off $4.4 million and $2.1 million, respectively, of earnest money deposits and pre-acquisition costs related to land option contracts that are expected to be terminated. During the six months ended March 31, 2015 and 2014, the Company wrote off $6.6 million and $4.8 million, respectively, of these deposits and costs.

Notes_Payable

Notes Payable	6 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
NOTES PAYABLE	NOTES PAYABLE
	The Company’s notes payable at their principal amounts, net of any unamortized discounts, consist of the following:
		March 31,		September 30,
		2015		2014
		(In millions)
	Homebuilding:
	Unsecured:
	Revolving credit facility, maturing 2019	$	175	$	300
	5.25% senior notes due 2015, net	—		157.7
	5.625% senior notes due 2016, net	170		169.9
	6.5% senior notes due 2016, net	372.6		372.6
	4.75% senior notes due 2017	350		350
	3.625% senior notes due 2018	400		400
	3.75% senior notes due 2019	500		500
	4.0% senior notes due 2020	500		—
	4.375% senior notes due 2022	350		350
	4.75% senior notes due 2023	300		300
	5.75% senior notes due 2023	400		400
	Other secured notes	30.4		23.4
		$	3,548.00	$	3,323.60
	Financial Services:
	Mortgage repurchase facility, maturing 2016	$	397.5	$	359.2
	Homebuilding:
	The Company has a $975 million senior unsecured revolving credit facility with an uncommitted accordion feature that could increase the size of the facility to $1.25 billion, subject to certain conditions and availability of additional bank commitments. The facility also provides for the issuance of letters of credit with a sublimit equal to approximately 50% of the revolving credit commitment. Letters of credit issued under the facility reduce the available borrowing capacity. The interest rate on borrowings under the revolving credit facility may be based on either the Prime Rate or London Interbank Offered Rate (LIBOR) plus an applicable margin, as defined in the credit agreement governing the facility. The maturity date of the facility is September 7, 2019. At March 31, 2015, the Company had $175.0 million of borrowings outstanding at a 1.9% annual interest rate and $90.3 million of letters of credit issued under the revolving credit facility.
	The Company's revolving credit facility imposes restrictions on its operations and activities, including requiring the maintenance of a minimum level of tangible net worth, a maximum allowable ratio of debt to tangible net worth and a borrowing base restriction if the Company's ratio of debt to tangible net worth exceeds a certain level. These covenants are measured as defined in the credit agreement governing the facility and are reported to the lenders quarterly. A failure to comply with these financial covenants could allow the lending banks to terminate the availability of funds under the revolving credit facility or cause any outstanding borrowings to become due and payable prior to maturity. In addition, the credit agreement governing the facility and the indentures governing the senior notes impose restrictions on the creation of secured debt and liens. At March 31, 2015, the Company was in compliance with all of the covenants, limitations and restrictions of its revolving credit facility and public debt obligations.
	The Company has an automatically effective universal shelf registration statement, filed with the Securities and Exchange Commission (SEC) in September 2012, registering debt and equity securities that the Company may issue from time to time in amounts to be determined. The Company anticipates filing a new universal shelf registration statement that will register debt and equity securities prior to the expiration of its current universal shelf registration statement in September 2015.
	In February 2015, the Company issued $500 million principal amount of 4.0% senior notes due February 15, 2020, with interest payable semi-annually. The notes represent unsecured obligations of the Company. The annual effective interest rate of the senior notes after giving effect to the amortization of financing costs is 4.2%. On February 15, 2015, the Company repaid the remaining $157.7 million principal amount of its 5.25% senior notes which were due on that date.
	Effective August 1, 2014, the Board of Directors authorized the repurchase of up to $500 million of the Company's debt securities effective through July 31, 2015. All of the $500 million authorization was remaining at March 31, 2015.
	Financial Services:
	The Company’s mortgage subsidiary, DHI Mortgage, has a mortgage repurchase facility that is accounted for as a secured financing. The mortgage repurchase facility provides financing and liquidity to DHI Mortgage by facilitating purchase transactions in which DHI Mortgage transfers eligible loans to the counterparties against the transfer of funds by the counterparties, thereby becoming purchased loans. DHI Mortgage then has the right and obligation to repurchase the purchased loans upon their sale to third-party purchasers in the secondary market or within specified time frames from 45 to 120 days in accordance with the terms of the mortgage repurchase facility. In February 2015, the mortgage repurchase facility was amended and its maturity date was extended to February 26, 2016. Additionally, new commitments were obtained from banks which increased the total capacity of the facility to $400 million. The amendment allows for the capacity of the facility to be increased further, without requiring additional commitments, from $400 million to $450 million during the last five days of any fiscal quarter and the first twenty-five days of the following fiscal quarter. Additionally, the capacity of the facility can be increased to $550 million subject to the availability of additional commitments.
	As of March 31, 2015, $485.6 million of mortgage loans held for sale with a collateral value of $469.6 million were pledged under the mortgage repurchase facility. As a result of advance paydowns totaling $72.1 million, DHI Mortgage had an obligation of $397.5 million outstanding under the mortgage repurchase facility at March 31, 2015 at a 2.4% annual interest rate.
	The mortgage repurchase facility is not guaranteed by D.R. Horton, Inc. or any of the subsidiaries that guarantee the Company’s homebuilding debt. The facility contains financial covenants as to the mortgage subsidiary’s minimum required tangible net worth, its maximum allowable ratio of debt to tangible net worth and its minimum required liquidity. These covenants are measured and reported monthly. At March 31, 2015, DHI Mortgage was in compliance with all of the conditions and covenants of the mortgage repurchase facility.

Capitalized_Interest

Capitalized Interest	6 Months Ended
	Mar. 31, 2015
Interest Costs Incurred [Abstract]
Capitalized Interest [Text Block]	CAPITALIZED INTEREST
	The Company capitalizes interest costs incurred to inventory during active development and construction (active inventory). Capitalized interest is charged to cost of sales as the related inventory is delivered to the buyer. During periods in which the Company’s active inventory is lower than its debt level, a portion of the interest incurred is immediately reflected as interest expense. Since the third quarter of fiscal 2013, the Company's active inventory has exceeded its debt level, and all interest incurred has been capitalized to inventory.
	The following table summarizes the Company’s interest costs incurred, capitalized and expensed during the three and six months ended March 31, 2015 and 2014:
			Three Months Ended						Six Months Ended
			March 31,						March 31,
			2015			2014			2015			2014
			(In millions)
	Capitalized interest, beginning of period		$	205.2		$	161.1		$	198.5		$	137.1
	Interest incurred (1)		42.6			49.5			83			98.8
	Interest expensed:
	Charged to cost of sales		(35.6		)	(26.9		)	(69.2		)	(52.2		)
	Written off with inventory impairments		—			—			(0.1		)	—
	Capitalized interest, end of period		$	212.2		$	183.7		$	212.2		$	183.7
	_______________
	-1	Interest incurred includes interest incurred on the Company's financial services mortgage repurchase facility of $1.6 million and $3.1 million in the three and six months ended March 31, 2015, respectively, and $0.9 million and $1.8 million in the same periods of 2014.
Rollforward of capitalized interest	The following table summarizes the Company’s interest costs incurred, capitalized and expensed during the three and six months ended March 31, 2015 and 2014:
			Three Months Ended						Six Months Ended
			March 31,						March 31,
			2015			2014			2015			2014
			(In millions)
	Capitalized interest, beginning of period		$	205.2		$	161.1		$	198.5		$	137.1
	Interest incurred (1)		42.6			49.5			83			98.8
	Interest expensed:
	Charged to cost of sales		(35.6		)	(26.9		)	(69.2		)	(52.2		)
	Written off with inventory impairments		—			—			(0.1		)	—
	Capitalized interest, end of period		$	212.2		$	183.7		$	212.2		$	183.7
	_______________
	-1	Interest incurred includes interest incurred on the Company's financial services mortgage repurchase facility of $1.6 million and $3.1 million in the three and six months ended March 31, 2015, respectively, and $0.9 million and $1.8 million in the same periods of 2014.

Mortgage_Loans

Mortgage Loans	6 Months Ended
	Mar. 31, 2015
Mortgage Loans on Real Estate [Abstract]
MORTGAGE LOANS	MORTGAGE LOANS
	Mortgage Loans Held for Sale
	Mortgage loans held for sale consist primarily of single-family residential loans collateralized by the underlying property. At March 31, 2015, mortgage loans held for sale had an aggregate fair value of $517.6 million and an aggregate outstanding principal balance of $502.0 million. At September 30, 2014, mortgage loans held for sale had an aggregate fair value of $476.9 million and an aggregate outstanding principal balance of $466.6 million. During the six months ended March 31, 2015 and 2014, mortgage loans originated totaled $2.2 billion and $1.6 billion, respectively, and mortgage loans sold totaled $2.2 billion and $1.6 billion, respectively. The Company had gains on sales of loans and servicing rights, net of recourse expense (benefit), of $40.8 million and $73.6 million during the three and six months ended March 31, 2015, compared to $23.9 million and $44.4 million in the same periods of 2014. Net gains on sales of loans and servicing rights are included in financial services revenues in the consolidated statements of operations. Approximately 84% of the mortgage loans sold by DHI Mortgage during the six months ended March 31, 2015 were sold to three major financial entities, none of whom purchased more than 40% of the total loans sold.
	To manage the interest rate risk inherent in its mortgage operations, the Company hedges its risk using derivative instruments, generally forward sales of mortgage-backed securities (MBS), which are referred to as “hedging instruments” in the following discussion. The Company does not enter into or hold derivatives for trading or speculative purposes.
	Newly originated loans that have been closed but not committed to third-party purchasers are hedged to mitigate the risk of changes in their fair value. Hedged loans are committed to third-party purchasers typically within three days after origination. The notional amounts of the hedging instruments used to hedge mortgage loans held for sale vary in relationship to the underlying loan amounts, depending on the movements in the value of each hedging instrument relative to the value of the underlying mortgage loans. The fair value change related to the hedging instruments generally offsets the fair value change in the mortgage loans held for sale. The net fair value change, which for the three and six months ended March 31, 2015 and 2014 was not significant, is recognized in financial services revenues in the consolidated statements of operations. At March 31, 2015 and September 30, 2014, the Company's mortgage loans held for sale that were not committed to third-party purchasers totaled $373.4 million and $348.6 million, respectively, and the notional amounts of the hedging instruments related to those loans totaled $373.3 million and $348.2 million, respectively.
	Other Mortgage Loans and Loss Reserves
	Mortgage loans are sold with limited recourse provisions derived from industry-standard representations and warranties in the relevant agreements. Primarily, these representations and warranties involve the absence of misrepresentations by the borrower or other parties, the appropriate underwriting of the loan and in some cases, a required minimum number of payments to be made by the borrower. The Company generally does not retain any other continuing interest related to mortgage loans sold in the secondary market. Other mortgage loans generally consist of loans repurchased due to these limited recourse obligations. Typically, these loans are impaired and some become real estate owned through the foreclosure process. At March 31, 2015 and September 30, 2014, the Company’s total other mortgage loans and real estate owned, before loss reserves, were as follows:
		March 31,		September 30,
		2015		2014
		(In millions)
	Other mortgage loans	$	45.3	$	41
	Real estate owned	0.5		0.7
		$	45.8	$	41.7
	The Company has recorded reserves for estimated losses on other mortgage loans, real estate owned and future loan repurchase obligations due to the limited recourse provisions, all of which are recorded as reductions of financial services revenue. The loss reserve for loan repurchase and settlement obligations is estimated based on an analysis of loan repurchase requests received, actual repurchases and losses through the disposition of such loans or requests, discussions with mortgage purchasers and analysis of mortgages originated. The reserve balances at March 31, 2015 and September 30, 2014 were as follows:
		March 31,		September 30,
		2015		2014
		(In millions)
	Loss reserves related to:
	Other mortgage loans	$	1.6	$	1.7
	Real estate owned	0.1		0.1
	Loan repurchase and settlement obligations – known and expected	21.7		24.4
		$	23.4	$	26.2
	Other mortgage loans and real estate owned net of the related loss reserves are included in financial services other assets, while loan repurchase obligations are included in financial services accounts payable and other liabilities in the accompanying consolidated balance sheets.
	Loan Commitments and Related Derivatives
	The Company is party to interest rate lock commitments (IRLCs), which are extended to borrowers who have applied for loan funding and meet defined credit and underwriting criteria. At March 31, 2015 and September 30, 2014, the notional amount of IRLCs, which are accounted for as derivative instruments recorded at fair value, totaled $440.1 million and $303.2 million, respectively.
	The Company manages interest rate risk related to its IRLCs through the use of best-efforts whole loan delivery commitments and hedging instruments. These instruments are considered derivatives in an economic hedge and are accounted for at fair value with gains and losses recognized in financial services revenues in the consolidated statements of operations. At March 31, 2015 and September 30, 2014, the notional amount of best-efforts whole loan delivery commitments totaled $46.0 million and $28.2 million, respectively, and the notional amount of hedging instruments related to IRLCs not yet committed to purchasers totaled $351.7 million and $243.8 million, respectively.

Income_Taxes

Income Taxes	6 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES
	The Company’s income tax expense for the three and six months ended March 31, 2015 was $82.2 million and $160.4 million, respectively, compared to $70.9 million and $137.5 million in the same periods of fiscal 2014. The effective tax rate was 35.7% and 35.6% for the three and six months ended March 31, 2015, respectively, compared to 35.1% in both periods of fiscal 2014. The effective tax rates for all periods include an expense for state income taxes that is partially offset by a tax benefit for the domestic production activities deduction.
	At March 31, 2015 and September 30, 2014, the Company had deferred tax assets, net of deferred tax liabilities, of $578.6 million and $596.1 million, respectively, partially offset by valuation allowances of $30.9 million and $31.1 million, respectively. The valuation allowance for both periods relates to the Company’s state deferred tax assets for net operating loss (NOL) carryforwards. The Company believes it is more likely than not that a portion of its state NOL carryforwards will not be realized because some state NOL carryforward periods are too brief to realize the related deferred tax assets.
	When assessing the realizability of deferred tax assets, the Company considers whether it is more likely than not that some portion or all of its deferred tax assets will not be realized. The realization of deferred tax assets is dependent upon the generation of sufficient taxable income in future periods. The Company records a valuation allowance when it determines it is more likely than not that a portion of the deferred tax assets will not be realized. The accounting for deferred taxes is based upon estimates of future results. Differences between the anticipated and actual outcomes of these future results could have a material impact on the Company's consolidated results of operations or financial position. Also, changes in existing federal and state tax laws and tax rates could affect future tax results and the valuation of the Company's deferred tax assets.

Earnings_Per_Share

Earnings Per Share	6 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE
	The following table sets forth the numerators and denominators used in the computation of basic and diluted earnings per share. Options to purchase 8.7 million and 9.1 million shares of common stock were excluded from the computation of diluted earnings per share for the 2015 and 2014 periods, respectively, because their effect would have been antidilutive.
		Three Months Ended				Six Months Ended
		March 31,				March 31,
		2015		2014		2015		2014
		(In millions)
	Numerator:
	Net income	$	147.9	$	131	$	290.4	$	254.1
	Effect of dilutive securities:
	Interest and amortization of issuance costs associated with convertible senior notes, net of tax	—		6.9		—		13.7
	Numerator for diluted earnings per share after assumed conversions	$	147.9	$	137.9	$	290.4	$	267.8
	Denominator:
	Denominator for basic earnings per share — weighted average common shares	365.8		324.3		365.4		323.7
	Effect of dilutive securities:
	Employee stock awards	3.6		3.4		3.4		3.1
	Convertible senior notes	—		38.6		—		38.6
	Denominator for diluted earnings per share — adjusted weighted average common shares	369.4		366.3		368.8		365.4
	Basic net income per common share	$	0.4	$	0.4	$	0.79	$	0.79
	Net income per common share assuming dilution	$	0.4	$	0.38	$	0.79	$	0.73

Stockholders_Equity

Stockholders' Equity	6 Months Ended
	Mar. 31, 2015
Equity [Abstract]
STOCKHOLDERS' EQUITY	STOCKHOLDERS’ EQUITY
	The Company has an automatically effective universal shelf registration statement, filed with the SEC in September 2012, registering debt and equity securities that it may issue from time to time in amounts to be determined. The Company anticipates filing a new universal shelf registration statement that will register debt and equity securities prior to the expiration of its current universal shelf registration statement in September 2015.
	Effective August 1, 2014, the Board of Directors authorized the repurchase of up to $100 million of the Company’s common stock effective through July 31, 2015. All of the $100 million authorization was remaining at March 31, 2015, and no common stock has been repurchased subsequent to March 31, 2015.
	During the three months ended March 31, 2015, the Board of Directors approved a quarterly cash dividend of $0.0625 per common share, which was paid on February 17, 2015 to stockholders of record on February 6, 2015. A quarterly cash dividend of $0.0375 per common share was approved and paid during the three months ended March 31, 2014. In April 2015, the Board of Directors approved a quarterly cash dividend of $0.0625 per common share, payable on May 27, 2015 to stockholders of record on May 15, 2015.

Employee_Benefit_Plans

Employee Benefit Plans	6 Months Ended
	Mar. 31, 2015
Compensation Related Costs [Abstract]
EMPLOYEE BENEFIT PLANS	EMPLOYEE BENEFIT PLANS
	Restricted Stock Units
	In November 2014, the Compensation Committee of the Company's Board of Directors approved and granted a total of 290,000 performance based restricted stock units (Performance RSUs) to the Chairman of the Board, Chief Executive Officer and Chief Operating Officer of the Company that vest at the end of a three-year performance period ending September 30, 2017. The number of units that ultimately vest depends on the Company's relative position as compared to its peers at the end of the three-year period in achieving certain performance criteria and can range from 0% to 200% of the number of units granted. The performance criteria are total shareholder return, return on investment, SG&A expense containment and gross profit. Each Performance RSU represents the contingent right to receive one share of the Company's common stock if the vesting conditions are satisfied. The Performance RSUs have no dividend or voting rights during the performance period. The fair value of these equity awards on the date of grant was $23.62 per unit. Compensation expense related to this grant was $0.7 million and $1.3 million, respectively, for the three and six months ended March 31, 2015, based on the Company's performance against the peer group, the elapsed portion of the performance period and the grant date fair value of the award.
	In November 2014, the Compensation Committee also approved and granted an award of 30,000 restricted stock units (RSUs) to the Chief Financial Officer of the Company that vest annually in equal installments over a three-year period ending in November 2017. Each RSU represents the contingent right to receive one share of the Company's common stock if the vesting conditions are satisfied. The RSUs have no dividend or voting rights during the vesting period. The fair value of this equity award on the date of grant was $21.88 per unit. Compensation expense related to this grant was $0.1 million in the six months ended March 31, 2015.
	In March 2015, the Compensation Committee of the Board of Directors and the Board of Directors approved and granted awards of approximately 2.0 million RSUs to the executive officers, other key employees and non-management directors of the Company. The RSUs were awarded to approximately 570 recipients and vest annually in equal installments over periods of three to five years. Each RSU represents the contingent right to receive one share of the Company's common stock if the vesting conditions are satisfied. The RSUs have no dividend or voting rights during the vesting period. RSUs generally result in less dilution to shareholders than stock options, which have been granted to key employees in the past. RSUs also provide an immediate, tangible value to the recipient and better diversification than stock options alone, which promotes the retention of key employees over the multi-year vesting period. The average fair value of these equity awards on the date of grant was $26.09 per unit. Compensation expense related to this grant was $3.8 million in the three and six months ended March 31, 2015.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES
	Warranty Claims
	The Company typically provides its homebuyers with a ten-year limited warranty for major defects in structural elements such as framing components and foundation systems, a two-year limited warranty on major mechanical systems, and a one-year limited warranty on other construction components. The Company’s warranty liability is based upon historical warranty cost experience in each market in which it operates, and is adjusted as appropriate to reflect qualitative risks associated with the types of homes built and the geographic areas in which they are built.
	Changes in the Company’s warranty liability during the three and six months ended March 31, 2015 and 2014 were as follows:
			Three Months Ended							Six Months Ended
			March 31,							March 31,
			2015				2014			2015			2014
			(In millions)
	Warranty liability, beginning of period		$	65.9			$	56.7		$	65.7		$	56.9
	Warranties issued		10.4				7.4			20.5			14.6
	Changes in liability for pre-existing warranties		2.8				1.1			0.6			2.1
	Settlements made		(7.5		)		(7.9		)	(15.2		)	(16.3		)
	Warranty liability, end of period		$	71.6			$	57.3		$	71.6		$	57.3
	Legal Claims and Insurance
	The Company is named as a defendant in various claims, complaints and other legal actions in the ordinary course of business. At any point in time, the Company is managing several hundred individual claims related to construction defect matters, personal injury claims, employment matters, land development issues and contract disputes. The Company has established reserves for these contingencies based on the estimated costs of pending claims and the estimated costs of anticipated future claims related to previously closed homes. The estimated liabilities for these contingencies were $449.4 million and $456.9 million at March 31, 2015 and September 30, 2014, respectively, and are included in homebuilding accrued expenses and other liabilities in the consolidated balance sheets. At both March 31, 2015 and September 30, 2014, approximately 99% of these reserves related to construction defect matters. Expenses related to the Company’s legal contingencies were $20.4 million and $5.4 million in the six months ended March 31, 2015 and 2014, respectively.
	The Company’s reserves for construction defect claims include the estimated costs of both known claims and anticipated future claims. As of March 31, 2015, no individual existing claim was material to the Company’s financial statements, and the majority of the Company’s total construction defect reserves consisted of the estimated exposure to future claims on previously closed homes. The Company has closed a significant number of homes during recent years, and the Company may be subject to future construction defect claims on these homes. Although regulations vary from state to state, construction defect issues can generally be reported for up to ten years after the home has closed in many states in which the Company operates. Historical data and trends regarding the frequency of claims incurred and the costs to resolve claims relative to the types of products and markets where the Company operates are used to estimate the construction defect liabilities for both existing and anticipated future claims. These estimates are subject to ongoing revision as the circumstances of individual pending claims and historical data and trends change. Adjustments to estimated reserves are recorded in the accounting period in which the change in estimate occurs.
	Historical trends in construction defect claims have been inconsistent, and the Company believes they may continue to fluctuate over the next several years. Housing market conditions have been volatile across most of the Company's markets over the past ten years, and the Company believes such conditions can affect the frequency and cost of construction defect claims. The Company closed a significant number of homes during its peak operating years from 2003 to 2007. If the ultimate resolution of construction defect claims resulting from closings in the Company's peak operating years varies from current expectations, it could significantly change the Company's estimates regarding the frequency and timing of claims incurred and the costs to resolve existing and anticipated future claims, which would impact the construction defect reserves in the future. If the frequency of claims incurred or costs of existing and future legal claims significantly exceed the Company's current estimates, they will have a significant negative impact on its future earnings and liquidity.
	The Company's reserves for legal claims decreased from $456.9 million at September 30, 2014 to $449.4 million at March 31, 2015 due to payments made for legal claims during the period, net of reimbursements received from subcontractors, partially offset by an increase in the number of closed homes that are subject to possible future construction defect claims. Changes in the Company’s legal claims reserves during the six months ended March 31, 2015 and 2014 were as follows:
		Six Months Ended
		March 31,
		2015				2014
		(In millions)
	Reserves for legal claims, beginning of period	$	456.9			$	482
	Increase (decrease) in reserves	20.8				(17.4		)
	Payments	(28.3		)		(10.4		)
	Reserves for legal claims, end of period	$	449.4			$	454.2
	The Company estimates and records receivables when recovery is probable under its applicable insurance policies related to its estimated contingencies for known claims and anticipated future construction defect claims on previously closed homes and other legal claims and lawsuits incurred in the ordinary course of business. Additionally, the Company may have the ability to recover a portion of its losses from its subcontractors and their insurance carriers when the Company has been named as an additional insured on their insurance policies. The Company's receivables related to its estimates of insurance recoveries from estimated losses from pending legal claims and anticipated future claims related to previously closed homes totaled $134.1 million, $138.4 million and $136.1 million at March 31, 2015, September 30, 2014 and March 31, 2014, respectively, and are included in homebuilding other assets in the consolidated balance sheets.
	The estimation of losses related to these reserves and the related estimates of recoveries from insurance policies are subject to a high degree of variability due to uncertainties such as trends in construction defect claims relative to the Company's markets and the types of products built, claim frequency, claim settlement costs and patterns, insurance industry practices and legal interpretations, among others. Due to the high degree of judgment required in establishing reserves for these contingencies, actual future costs and recoveries from insurance could differ significantly from current estimated amounts, and it is not possible for the Company to make a reasonable estimate of the possible loss or range of loss in excess of its reserves.
	Land and Lot Option Purchase Contracts
	The Company enters into land and lot option purchase contracts to acquire land or lots for the construction of homes. At March 31, 2015, the Company had total deposits of $64.4 million, consisting of cash deposits of $56.9 million and promissory notes, letters of credit and surety bonds of $7.5 million, to purchase land and lots with a total remaining purchase price of approximately $2.0 billion. A limited number of the land and lot option purchase contracts at March 31, 2015, representing $25.7 million of remaining purchase price, were subject to specific performance clauses which may require the Company to purchase the land or lots upon the land sellers meeting their contractual obligations. The majority of land and lots under contract are currently expected to be purchased within three years.
	Other Commitments
	At March 31, 2015, the Company had outstanding surety bonds of $945.2 million and letters of credit of $93.4 million to secure performance under various contracts. Of the total letters of credit, $90.3 million were issued under the Company's revolving credit facility. The remaining $3.1 million of letters of credit were issued under secured letter of credit agreements requiring the Company to deposit cash as collateral with the issuing banks, and the cash restricted for this purpose is included in homebuilding restricted cash in the consolidated balance sheets.

Other_Assets_and_Accrued_Expen

Other Assets and Accrued Expenses and Other Liabilities	6 Months Ended
	Mar. 31, 2015
Other Assets and Accrued Expenses and Other Liabilities [Abstract]
OTHER ASSETS AND ACCRUED EXPENSES AND OTHER LIABILITIES	OTHER ASSETS AND ACCRUED EXPENSES AND OTHER LIABILITIES
	The Company’s homebuilding other assets at March 31, 2015 and September 30, 2014 were as follows:
		March 31,		September 30,
		2015		2014
		(In millions)
	Insurance receivables	$	134.1	$	138.4
	Earnest money and refundable deposits	121		113.3
	Accounts and notes receivable	43		38.6
	Prepaid assets	51.5		55.4
	Rental properties	48.6		48.7
	Debt securities collateralized by residential real estate	20.8		20.8
	Other assets	23.4		25.9
		$	442.4	$	441.1
	The Company’s homebuilding accrued expenses and other liabilities at March 31, 2015 and September 30, 2014 were as follows:
		March 31,		September 30,
		2015		2014
		(In millions)
	Reserves for legal claims	$	449.4	$	456.9
	Employee compensation and related liabilities	144.2		150.8
	Warranty liability	71.6		65.7
	Accrued interest	31		29.1
	Federal and state income tax liabilities	6.6		12.8
	Inventory related accruals	29.7		36.1
	Homebuyer deposits	54.8		49.5
	Accrued property taxes	17.5		29.1
	Other liabilities	42.9		45
		$	847.7	$	875

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS
	Fair value measurements are used for the Company's mortgage loans held for sale, debt securities collateralized by residential real estate, IRLCs and other derivative instruments on a recurring basis, and are used for inventories, other mortgage loans, rental properties and real estate owned on a nonrecurring basis, when events and circumstances indicate that the carrying value may not be recoverable. The fair value hierarchy and its application to the Company’s assets and liabilities is as follows:
	•	Level 1 – Valuation is based on quoted prices in active markets for identical assets and liabilities.
	•	Level 2 – Valuation is determined from quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar instruments in markets that are not active, or by model-based techniques in which all significant inputs are observable in the market. The Company’s assets and liabilities measured at fair value using Level 2 inputs on a recurring basis are as follows:
	▪	mortgage loans held for sale;
	▪	IRLCs; and
	▪	loan sale commitments and hedging instruments.
	•	Level 3 – Valuation is typically derived from model-based techniques in which at least one significant input is unobservable and based on the Company’s own estimates about the assumptions that market participants would use to value the asset or liability.
	The Company's assets measured at fair value using Level 3 inputs on a recurring basis are as follows:
	▪	debt securities collateralized by residential real estate; and
	▪	a limited number of mortgage loans held for sale with some degree of impairment affecting their marketability.
	The Company’s assets measured at fair value using Level 3 inputs that are typically reported at the lower of carrying value or fair value on a nonrecurring basis are as follows:
	▪	inventory held and used;
	▪	inventory available for sale;
	▪	certain other mortgage loans; and
	▪	rental properties and real estate owned.
	The following tables summarize the Company’s assets and liabilities measured at fair value on a recurring basis at March 31, 2015 and September 30, 2014, and the changes in the fair value of the Level 3 assets during the six months ended March 31, 2015.
				Fair Value at March 31, 2015
			Balance Sheet Location	Level 1			Level 2			Level 3				Total
				(In millions)
	Homebuilding:
	Debt securities collateralized by residential real estate (a)		Other assets	$	—		$	—		$	20.8			$	20.8
	Financial Services:
	Mortgage loans held for sale (b)		Mortgage loans held for sale	—			504.2			13.4				517.6
	Derivatives not designated as hedging instruments (c):
	Interest rate lock commitments		Other assets	—			4.6			—				4.6
	Forward sales of MBS		Other liabilities	—			(4.7		)	—				(4.7		)
	Best-efforts and mandatory commitments		Other liabilities	—			(0.5		)	—				(0.5		)
				Fair Value at September 30, 2014
			Balance Sheet Location	Level 1			Level 2			Level 3				Total
				(In millions)
	Homebuilding:
	Debt securities collateralized by residential real estate (a)		Other assets	$	—		$	—		$	20.8			$	20.8
	Financial Services:
	Mortgage loans held for sale (b)		Mortgage loans held for sale	—			464.9			12				476.9
	Derivatives not designated as hedging instruments (c):
	Interest rate lock commitments		Other assets	—			2.4			—				2.4
	Forward sales of MBS		Other liabilities	—			(1.9		)	—				(1.9		)
	Best-efforts and mandatory commitments		Other liabilities	—			(0.1		)	—				(0.1		)
		Level 3 Assets at Fair Value for the
		Six Months Ended March 31, 2015
		Balance at September 30, 2014			Net realized and unrealized gains (losses)			Purchases			Sales and Settlements				Principal Reductions		Net transfers in (out)		Balance at March 31, 2015
																	of Level 3
		(In millions)
	Debt securities collateralized by residential real estate (a)	$	20.8		$	—		$	—		$	—			$	—	$	—	$	20.8
	Mortgage loans held for sale (b)	12			0.4			—			(0.7		)		—		1.7		13.4
	(a)	In October 2012, the Company purchased defaulted debt securities which are secured by residential real estate. These securities, which are included in other assets in the consolidated balance sheets, are classified as available for sale and are reflected at fair value. The fair value of these securities was determined by estimating the future cash flows of the securities and the residential real estate utilizing discount rates of 6% and 18%, respectively. Unrealized gains or losses on these securities, net of tax, are recorded in accumulated other comprehensive income (loss) in the consolidated balance sheets. The Company has entered into an agreement to purchase this residential real estate parcel and all additional defaulted debt securities associated with the parcel, in order to develop the property and build and sell homes. In April 2015, the Company completed this purchase transaction for $19.6 million in cash. The purchase price will be allocated to the land and the debt securities acquired in the third quarter of fiscal 2015.
	(b)	Mortgage loans held for sale are reflected at fair value. Interest income earned on mortgage loans held for sale is based on contractual interest rates and included in financial services interest and other income. Mortgage loans held for sale at March 31, 2015 includes $13.4 million of originated loans for which the Company elected the fair value option upon origination and which the Company has not sold into the secondary market, but plans to sell as market conditions permit. The fair value of these mortgage loans held for sale is generally calculated considering the secondary market and adjusted for the value of the underlying collateral, including interest rate risk, liquidity risk and prepayment risk.
	(c)	Fair value measurements of these derivatives represent changes in fair value, as calculated by reference to quoted prices for similar assets, and are reflected in the balance sheet. Changes in these fair values during the periods presented are included in financial services revenues in the consolidated statements of operations.
	The following table summarizes the Company’s assets measured at fair value on a nonrecurring basis at March 31, 2015 and September 30, 2014:
				Fair Value at March 31, 2015			Fair Value at September 30, 2014
			Balance Sheet Location	Level 3			Level 3
				(In millions)
	Homebuilding:
	Inventory held and used (a) (b)		Inventories	$	21.6		$	19.2
	Inventory available for sale (a) (c)		Inventories	1.4			8.2
	Financial Services:
	Other mortgage loans (a) (d)		Other assets	14.6			16
	Real estate owned (a) (d)		Other assets	0.2			0.5
	_______________________________________
	(a)	The fair values included in the table above represent only those assets whose carrying values were adjusted to fair value in the respective quarter.
	(b)	In performing its impairment analysis of communities, discount rates ranging from 12% to 18% were used in the periods presented.
	(c)	The fair value of inventory available for sale was determined based on recent offers received from outside third parties, comparable sales or actual contracts.
	(d)	The fair values of other mortgage loans and real estate owned are determined based on the value of the underlying collateral.
For the financial assets and liabilities that the Company does not reflect at fair value, the following tables present both their respective carrying value and fair value at March 31, 2015 and September 30, 2014:
	Carrying Value			Fair Value at March 31, 2015
				Level 1			Level 2			Level 3				Total
	(In millions)
Homebuilding:
Cash and cash equivalents (a)	$	665.8		$	665.8		$	—		$	—			$	665.8
Restricted cash (a)	10.4			10.4			—			—				10.4
Revolving credit facility (a)	175			—			—			175				175
Senior notes (b)	3,342.60			—			3,432.90			—				3,432.90
Other secured notes (a)	30.4			—			—			30.4				30.4
Financial Services:
Cash and cash equivalents (a)	31.9			31.9			—			—				31.9
Mortgage repurchase facility (a)	397.5			—			—			397.5				397.5
	Carrying Value			Fair Value at September 30, 2014
				Level 1			Level 2			Level 3				Total
	(In millions)
Homebuilding:
Cash and cash equivalents (a)	$	632.5		$	632.5		$	—		$	—			$	632.5
Restricted cash (a)	10			10			—			—				10
Revolving credit facility (a)	300			—			—			300				300
Senior notes (b)	3,000.20			—			3,033.80			—				3,033.80
Other secured notes (a)	23.4			—			—			23.4				23.4
Financial Services:
Cash and cash equivalents (a)	29.3			29.3			—			—				29.3
Mortgage repurchase facility (a)	359.2			—			—			359.2				359.2
_______________________________________
(a)	The fair value approximates carrying value due to its short-term nature, short maturity or floating interest rate terms, as applicable.
(b)	The fair value is determined based on quoted market prices of recent transactions of the notes, which is classified as Level 2 within the fair value hierarchy.

Subsequent_Event_Notes

Subsequent Event (Notes)	6 Months Ended
	Mar. 31, 2015
Subsequent Event [Line Items]
Subsequent Events [Text Block]	SUBSEQUENT EVENT
	On April 24, 2015, the Company acquired the homebuilding operations of Pacific Ridge Homes for approximately $72 million in cash. Pacific Ridge Homes operates in Seattle, Washington. The assets acquired included approximately 90 homes in inventory, 350 lots and control of approximately 400 additional lots through option contracts. The Company also acquired a sales order backlog of 41 homes valued at $18.0 million.

Supplemental_Guarantor_Informa

Supplemental Guarantor Information	6 Months Ended
	Mar. 31, 2015
Supplemental Guarantor Information [Abstract]
SUPPLEMENTAL GUARANTOR INFORMATION	SUPPLEMENTAL GUARANTOR INFORMATION
	All of the Company's senior notes and the unsecured revolving credit facility are fully and unconditionally guaranteed, on a joint and several basis, by substantially all of the Company's homebuilding subsidiaries (collectively, Guarantor Subsidiaries). Each of the Guarantor Subsidiaries is 100% owned, directly or indirectly, by the Company. The Company's subsidiaries engaged in the financial services segment and certain other subsidiaries do not guarantee the Company's senior notes and the unsecured revolving credit facility (collectively, Non-Guarantor Subsidiaries). In lieu of providing separate financial statements for the Guarantor Subsidiaries, consolidating condensed financial statements are presented below. Separate financial statements and other disclosures concerning the Guarantor Subsidiaries are not presented because management has determined that they are not material to investors.
	The guarantees by a Guarantor Subsidiary will be automatically and unconditionally released and discharged upon: (1) the sale or other disposition of its common stock whereby it is no longer a subsidiary of the Company; (2) the sale or other disposition of all or substantially all of its assets (other than to the Company or another Guarantor); (3) its merger or consolidation with an entity other than the Company or another Guarantor; or (4) depending on the provisions of the applicable indenture, either (a) its proper designation as an unrestricted subsidiary, (b) its ceasing to guarantee any of the Company's publicly traded debt securities, or (c) its ceasing to guarantee any of the Company's obligations under the revolving credit facility.
	Consolidating Balance Sheet
	March 31, 2015
		D.R.			Guarantor			Non-Guarantor			Eliminations			Total
		Horton, Inc.			Subsidiaries			Subsidiaries
		(In millions)
	ASSETS
	Cash and cash equivalents	$	522.1		$	96		$	79.6		$	—		$	697.7
	Restricted cash	7			2.3			1.1			—			10.4
	Investments in subsidiaries	3,118.50			—			—			(3,118.5		)	—
	Inventories	2,768.10			5,344.20			24.6			—			8,136.90
	Deferred income taxes	178.5			358.5			10.7			—			547.7
	Property and equipment, net	56.8			50			87			—			193.8
	Other assets	168.6			246.8			98.8			—			514.2
	Mortgage loans held for sale	—			—			517.6			—			517.6
	Goodwill	—			94.8			—			—			94.8
	Intercompany receivables	2,484.80			—			—			(2,484.8		)	—
	Total Assets	$	9,304.40		$	6,192.60		$	819.4		$	(5,603.3	)	$	10,713.10
	LIABILITIES & EQUITY
	Accounts payable and other liabilities	$	367.1		$	842.9		$	136.6		$	—		$	1,346.60
	Intercompany payables	—			2,373.10			111.7			(2,484.8		)	—
	Notes payable	3,519.20			10.6			415.7			—			3,945.50
	Total Liabilities	3,886.30			3,226.60			664			(2,484.8		)	5,292.10
	Total stockholders’ equity	5,418.10			2,966.00			152.5			(3,118.5		)	5,418.10
	Noncontrolling interests	—			—			2.9			—			2.9
	Total Equity	5,418.10			2,966.00			155.4			(3,118.5		)	5,421.00
	Total Liabilities & Equity	$	9,304.40		$	6,192.60		$	819.4		$	(5,603.3	)	$	10,713.10
	NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
	Consolidating Balance Sheet
	September 30, 2014
		D.R.			Guarantor			Non-Guarantor			Eliminations			Total
		Horton, Inc.			Subsidiaries			Subsidiaries
		(In millions)
	ASSETS
	Cash and cash equivalents	$	497.4		$	89.5		$	74.9		$	—		$	661.8
	Restricted cash	6.8			2.1			1.1			—			10
	Investments in subsidiaries	2,878.20			—			—			(2,878.2		)	—
	Inventories	2,675.90			5,014.30			10.3			—			7,700.50
	Deferred income taxes	189.9			364.4			10.7			—			565
	Property and equipment, net	51.9			49.1			89.8			—			190.8
	Other assets	163			250.8			88.9			—			502.7
	Mortgage loans held for sale	—			—			476.9			—			476.9
	Goodwill	—			94.8			—			—			94.8
	Intercompany receivables	2,364.20			—			—			(2,364.2		)	—
	Total Assets	$	8,827.30		$	5,865.00		$	752.6		$	(5,242.4	)	$	10,202.50
	LIABILITIES & EQUITY
	Accounts payable and other liabilities	$	409.8		$	853.3		$	136.9		$	—		$	1,400.00
	Intercompany payables	—			2,282.20			82			(2,364.2		)	—
	Notes payable	3,301.70			3.4			377.7			—			3,682.80
	Total Liabilities	3,711.50			3,138.90			596.6			(2,364.2		)	5,082.80
	Total stockholders’ equity	5,115.80			2,726.10			152.1			(2,878.2		)	5,115.80
	Noncontrolling interests	—			—			3.9			—			3.9
	Total Equity	5,115.80			2,726.10			156			(2,878.2		)	5,119.70
	Total Liabilities & Equity	$	8,827.30		$	5,865.00		$	752.6		$	(5,242.4	)	$	10,202.50
	NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
	Consolidating Statement of Operations
	Three Months Ended March 31, 2015
		D.R.			Guarantor			Non-Guarantor			Eliminations			Total
		Horton, Inc.			Subsidiaries			Subsidiaries
		(In millions)
	Homebuilding:
	Revenues	$	727		$	1,611.50		$	—		$	—		$	2,338.50
Cost of sales	593.7			1,297.80			0.5			—			1,892.00
Gross profit (loss)	133.3			313.7			(0.5		)	—			446.5
Selling, general and administrative expense	112.4			124.4			5.6			—			242.4
Equity in (income) of subsidiaries	(208.5		)	—			—			208.5			—
Other (income)	(0.7		)	(1.1		)	(2.7		)	—			(4.5		)
Homebuilding pre-tax income (loss)	230.1			190.4			(3.4		)	(208.5		)	208.6
Financial Services:
Revenues, net of recourse expense	—			—			59.5			—			59.5
General and administrative expense	—			—			40.7			—			40.7
Interest and other (income)	—			—			(2.7		)	—			(2.7		)
Financial services pre-tax income	—			—			21.5			—			21.5
Income before income taxes	230.1			190.4			18.1			(208.5		)	230.1
Income tax expense	82.2			67.7			6.9			(74.6		)	82.2
Net income	$	147.9		$	122.7		$	11.2		$	(133.9	)	$	147.9
Comprehensive income	$	147.9		$	122.7		$	11.2		$	(133.9	)	$	147.9
NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
Consolidating Statement of Operations
Six Months Ended March 31, 2015
	D.R.			Guarantor			Non-Guarantor			Eliminations			Total
	Horton, Inc.			Subsidiaries			Subsidiaries
	(In millions)
Homebuilding:
Revenues	$	1,423.80		$	3,167.70		$	—		$	—		$	4,591.50
Cost of sales	1,147.70			2,554.90			3.9			—			3,706.50
Gross profit (loss)	276.1			612.8			(3.9		)	—			885
Selling, general and administrative expense	222.6			245.6			12.2			—			480.4
Equity in (income) of subsidiaries	(396.3		)	—			—			396.3			—
Other (income)	(1.0		)	(2.5		)	(6.6		)	—			(10.1		)
Homebuilding pre-tax income (loss)	450.8			369.7			(9.5		)	(396.3		)	414.7
Financial Services:
Revenues, net of recourse expense	—			—			109.2			—			109.2
General and administrative expense	—			—			78.6			—			78.6
Interest and other (income)	—			—			(5.5		)	—			(5.5		)
Financial services pre-tax income	—			—			36.1			—			36.1
Income before income taxes	450.8			369.7			26.6			(396.3		)	450.8
Income tax expense	160.4			130.9			10.3			(141.2		)	160.4
Net income	$	290.4		$	238.8		$	16.3		$	(255.1	)	$	290.4
Comprehensive income	$	290.4		$	238.8		$	16.3		$	(255.1	)	$	290.4
NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
Consolidating Statement of Operations
Three Months Ended March 31, 2014
	D.R.			Guarantor			Non-Guarantor			Eliminations			Total
	Horton, Inc.			Subsidiaries			Subsidiaries
	(In millions)
Homebuilding:
Revenues	$	574.1		$	1,119.70		$	2.8		$	—		$	1,696.60
Cost of sales	453.5			864			2.3			—			1,319.80
Gross profit	120.6			255.7			0.5			—			376.8
Selling, general and administrative expense	87.9			97.7			2.3			—			187.9
Equity in (income) of subsidiaries	(169.0		)	—			—			169			—
Other (income)	(0.2		)	(1.1		)	(1.5		)	—			(2.8		)
Homebuilding pre-tax income (loss)	201.9			159.1			(0.3		)	(169.0		)	191.7
Financial Services:
Revenues, net of recourse expense	—			—			38.4			—			38.4
General and administrative expense	—			—			30.2			—			30.2
Interest and other (income)	—			—			(2.0		)	—			(2.0		)
Financial services pre-tax income	—			—			10.2			—			10.2
Income before income taxes	201.9			159.1			9.9			(169.0		)	201.9
Income tax expense	70.9			55.9			3.4			(59.3		)	70.9
Net income	$	131		$	103.2		$	6.5		$	(109.7	)	$	131
Comprehensive income	$	131		$	103.5		$	6.5		$	(109.7	)	$	131.3
NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
Consolidating Statement of Operations
Six Months Ended March 31, 2014
	D.R.			Guarantor			Non-Guarantor			Eliminations			Total
	Horton, Inc.			Subsidiaries			Subsidiaries
	(In millions)
Homebuilding:
Revenues	$	1,126.20		$	2,200.00		$	6.1		$	—		$	3,332.30
Cost of sales	883			1,704.50			6			—			2,593.50
Gross profit	243.2			495.5			0.1			—			738.8
Selling, general and administrative expense	176.9			190.2			4.2			—			371.3
Equity in (income) of subsidiaries	(324.6		)	—			—			324.6			—
Other (income)	(0.7		)	(2.0		)	(3.4		)	—			(6.1		)
Homebuilding pre-tax income (loss)	391.6			307.3			(0.7		)	(324.6		)	373.6
Financial Services:
Revenues, net of recourse expense	—			—			73.3			—			73.3
General and administrative expense	—			—			60			—			60
Interest and other (income)	—			—			(4.7		)	—			(4.7		)
Financial services pre-tax income	—			—			18			—			18
Income before income taxes	391.6			307.3			17.3			(324.6		)	391.6
Income tax expense	137.5			107.9			6			(113.9		)	137.5
Net income	$	254.1		$	199.4		$	11.3		$	(210.7	)	$	254.1
Comprehensive income	$	254.1		$	199.7		$	11.3		$	(210.7	)	$	254.4
NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
Consolidating Statement of Cash Flows
Six Months Ended March 31, 2015
	D.R.			Guarantor			Non-Guarantor			Eliminations			Total
	Horton, Inc.			Subsidiaries			Subsidiaries
	(In millions)
OPERATING ACTIVITIES
Net cash used in operating activities	$	(35.5	)	$	(74.0	)	$	(44.3	)	$	(15.0	)	$	(168.8	)
INVESTING ACTIVITIES
(Purchases of) proceeds from property and equipment	(15.0		)	(11.0		)	2			—			(24.0		)
Increase in restricted cash	(0.2		)	(0.2		)	—			—			(0.4		)
Net principal increase of other mortgage loans and real estate owned	—			—			(4.9		)	—			(4.9		)
Intercompany advances	(120.9		)	—			—			120.9			—
Net cash used in investing activities	(136.1		)	(11.2		)	(2.9		)	120.9			(29.3		)
FINANCING ACTIVITIES
Proceeds from notes payable	1,312.00			—			38.3			—			1,350.30
Repayment of notes payable	(1,097.7		)	(0.3		)	(0.3		)	—			(1,098.3		)
Intercompany advances	—			92			28.9			(120.9		)	—
Proceeds from stock associated with certain employee benefit plans	21			—			—			—			21
Excess income tax benefit from employee stock awards	6.7			—			—			—			6.7
Cash dividends paid	(45.7		)	—			(15.0		)	15			(45.7		)
Net cash provided by financing activities	196.3			91.7			51.9			(105.9		)	234
Increase in cash and cash equivalents	24.7			6.5			4.7			—			35.9
Cash and cash equivalents at beginning of period	497.4			89.5			74.9			—			661.8
Cash and cash equivalents at end of period	$	522.1		$	96		$	79.6		$	—		$	697.7
NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
Consolidating Statement of Cash Flows
Six Months Ended March 31, 2014
	D.R.			Guarantor			Non-Guarantor			Eliminations			Total
	Horton, Inc.			Subsidiaries			Subsidiaries
	(In millions)
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	$	(169.9	)	$	(118.9	)	$	63		$	(40.0	)	$	(265.8	)
INVESTING ACTIVITIES
Purchases of property and equipment	(12.3		)	(15.1		)	(5.4		)	—			(32.8		)
(Increase) decrease in restricted cash	(2.1		)	—			0.1			—			(2.0		)
Net principal increase of other mortgage loans and real estate owned	—			—			(1.7		)	—			(1.7		)
Intercompany advances	(157.4		)	—			—			157.4			—
Payments related to acquisition of a business	(34.5		)	—			—			—			(34.5		)
Net cash used in investing activities	(206.3		)	(15.1		)	(7.0		)	157.4			(71.0		)
FINANCING ACTIVITIES
Proceeds from notes payable	497			—			—			—			497
Repayment of notes payable	(148.8		)	—			(14.8		)	—			(163.6		)
Intercompany advances	—			158.6			(1.2		)	(157.4		)	—
Proceeds from stock associated with certain employee benefit plans	29.6			—			—			—			29.6
Excess income tax benefit from employee stock awards	1.9			—			—			—			1.9
Cash dividends paid	(12.1		)	—			(40.0		)	40			(12.1		)
Net cash provided by (used in) financing activities	367.6			158.6			(56.0		)	(117.4		)	352.8
(Decrease) increase in cash and cash equivalents	(8.6		)	24.6			—			—			16
Cash and cash equivalents at beginning of period	871.4			38.4			67.6			—			977.4
Cash and cash equivalents at end of period	$	862.8		$	63		$	67.6		$	—		$	993.4

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	6 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Use of Estimates	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ materially from those estimates.
Reclassification, Policy [Policy Text Block]	Reclassifications
	Certain reclassifications have been made in the prior year financial statements to conform to classifications used in the current year. Cash balances of the Company's captive insurance subsidiary, which are expected to be used to fund the captive insurance subsidiary's operations and pay future anticipated legal claims, have been correctly presented within homebuilding cash and cash equivalents rather than homebuilding other assets. These balances were $42.0 million and $40.9 million at March 31, 2014 and September 30, 2013, respectively. The statement of cash flows for the six months ended March 31, 2014, including the statement of cash flows of the Non-Guarantor Subsidiaries as reflected in Note O, have been revised to reflect this correction. As other prior period financial information is presented in future filings, the Company will similarly revise its financial statements in such filings.
	Cash balances of the Company's captive insurance subsidiary, which were $40.5 million and $43.3 million at March 31, 2015 and September 30, 2014, respectively, are included in homebuilding cash and cash equivalents in the consolidated balance sheets.
Consolidation, Variable Interest Entity, Policy [Policy Text Block]	Variable Interests
	The Company enters into land and lot option purchase contracts to acquire land or lots for the construction of homes. Under these contracts, the Company will fund a stated deposit in consideration for the right, but not the obligation, to purchase land or lots at a future point in time with predetermined terms. Under the terms of many of the option purchase contracts, the option deposits are not refundable in the event the Company elects to terminate the contract.
	Option purchase contracts can result in the creation of a variable interest in the entity holding the land parcel under option. There were no variable interest entities reported in the consolidated balance sheets at March 31, 2015 and September 30, 2014 because the Company determined it did not control the activities that most significantly impact the variable interest entity’s economic performance and it did not have an obligation to absorb losses of or the right to receive benefits from the entity. The maximum exposure to losses related to the Company’s variable interest entities is limited to the amounts of the Company’s related option deposits. At March 31, 2015 and September 30, 2014, the amount of option deposits related to these contracts totaled $60.4 million and $55.7 million, respectively, and are included in homebuilding other assets in the consolidated balance sheets.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements
	In January 2014, the Financial Accounting Standards Board (FASB) issued ASU 2014-04, “Receivables - Troubled Debt Restructurings by Creditors,” which was revised in August 2014. ASU 2014-04 applies to all creditors who obtain physical possession of residential real estate property collateralizing a consumer mortgage loan in satisfaction of a receivable. The guidance clarifies when an in substance repossession or foreclosure of the property has occurred and helps determine when a creditor should derecognize a loan receivable and recognize real estate property. ASU 2014-14 applies to creditors that hold government-guaranteed mortgage loans and requires that these loans, including those guaranteed by the Federal Housing Administration (FHA) and Veterans Affairs (VA), be derecognized and that a separate other receivable be recognized upon foreclosure if certain conditions are met. Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance expected to be recovered from the guarantor. The guidance in this ASU is effective for the Company beginning October 1, 2015 and is not expected to have a material impact on its consolidated financial position, results of operations or cash flows.
	In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers,” which is a comprehensive new revenue recognition model that will replace most existing revenue recognition guidance. The core principle of this guidance is that an entity should recognize revenue for the transfer of goods or services equal to the amount that it expects to be entitled to receive for those goods or services. The guidance is expected to be effective for the Company beginning October 1, 2018 and allows for full retrospective or modified retrospective methods of adoption. The Company is currently evaluating the impact of this guidance on its consolidated financial position, results of operations and cash flows.
	In June 2014, the FASB issued ASU 2014-12, “Compensation - Stock Compensation,” which states that a performance target in a share-based payment that affects vesting and that could be achieved after the requisite service period should be accounted for as a performance condition. The guidance is effective for the Company beginning October 1, 2016 and is not expected to have a material impact on its consolidated financial position, results of operations or cash flows.
	In August 2014, the FASB issued ASU 2014-15, “Presentation of Financial Statements - Going Concern,” which provides guidance about management's responsibility to evaluate whether there is substantial doubt about the entity's ability to continue as a going concern and to provide related footnote disclosures. This guidance is intended to reduce the diversity in the timing and content of footnote disclosures. The guidance is effective for the Company beginning with its fiscal year ending September 30, 2017 and is not expected to have any impact on its consolidated financial position, results of operations or cash flows.
	In February 2015, the FASB issued ASU 2015-02, “Consolidation,” which changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. The guidance is effective for the Company beginning October 1, 2016 and is not expected to have a material impact on its consolidated financial position, results of operations or cash flows.
	In April 2015, the FASB issued ASU 2015-03, “Interest - Imputation of Interest,” which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability. This new guidance is a change from the current treatment of recording debt issuance costs as an asset representing a deferred charge, and is consistent with the accounting treatment for debt discounts. The guidance, which requires retrospective application, is effective for the Company beginning October 1, 2016, but early adoption is allowed. The Company is currently evaluating this guidance, which will not have a material impact on its consolidated financial position, results of operations or cash flows.

Segment_Information_Tables

Segment Information (Tables)	6 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	The accounting policies of the reporting segments are described throughout Note A included in the Company’s annual report on Form 10-K for the fiscal year ended September 30, 2014. Financial information relating to the Company's reporting segments is as follows:
			Three Months Ended				Six Months Ended
			March 31,				March 31,
			2015		2014		2015		2014
			(In millions)
	Revenues
	Homebuilding revenues:
	East		$	280.7	$	203.2	$	579.5	$	393.3
	Midwest		145		99.9		274.9		205.7
	Southeast		646.1		471.3		1,265.50		918.7
	South Central		628.2		430.4		1,207.90		851.5
	Southwest		70.9		63.1		146.3		133.8
	West		567.6		428.7		1,117.40		829.3
	Homebuilding revenues		2,338.50		1,696.60		4,591.50		3,332.30
	Financial services revenues		59.5		38.4		109.2		73.3
	Total revenues		$	2,398.00	$	1,735.00	$	4,700.70	$	3,405.60
	Inventory Impairments
	East		$	—	$	—	$	—	$	—
	Midwest		—		—		—		—
	Southeast		7.3		2.1		7.3		2.1
	South Central		0.7		—		0.7		—
	Southwest		—		—		—		—
	West		0.1		0.2		4		0.2
	Total inventory impairments		$	8.1	$	2.3	$	12	$	2.3
	Income Before Income Taxes (1)
	Homebuilding pre-tax income:
	East		$	13	$	14.2	$	39.4	$	25.7
	Midwest		10.2		9.1		15		19.1
	Southeast		58.7		52.2		116.7		103.7
	South Central		65.1		46.6		126.2		89
	Southwest		1.2		5.5		3.1		11.5
	West		60.4		64.1		114.3		124.6
	Homebuilding pre-tax income		208.6		191.7		414.7		373.6
	Financial services pre-tax income		21.5		10.2		36.1		18
	Income before income taxes		$	230.1	$	201.9	$	450.8	$	391.6
	________________
	-1	Expenses maintained at the corporate level consist primarily of interest and property taxes, which are capitalized and amortized to cost of sales or expensed directly, and the expenses related to operating the Company’s corporate office. The amortization of capitalized interest and property taxes is allocated to each segment based on the segment’s cost of sales, while those expenses associated with the corporate office are allocated to each segment based on the segment’s inventory balances.
			March 31,		September 30,
			2015		2014
			(In millions)
	Homebuilding Inventories (1)
	East		$	888.5	$	842.7
	Midwest		507		477.6
	Southeast		2,030.40		1,943.00
	South Central		1,927.70		1,742.50
	Southwest		290.6		292.9
	West		2,240.00		2,169.40
	Corporate and unallocated (2)		252.7		232.4
	Total homebuilding inventory		$	8,136.90	$	7,700.50
	________________
	-1	Homebuilding inventories are the only assets included in the measure of homebuilding segment assets used by the Company’s chief operating decision makers.
	-2	Corporate and unallocated consists primarily of capitalized interest and property taxes.

Notes_Payable_Tables

Notes Payable (Tables)	6 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Summary of notes payable at principal amounts, net of unamortized discounts	The Company’s notes payable at their principal amounts, net of any unamortized discounts, consist of the following:
		March 31,		September 30,
		2015		2014
		(In millions)
	Homebuilding:
	Unsecured:
	Revolving credit facility, maturing 2019	$	175	$	300
	5.25% senior notes due 2015, net	—		157.7
	5.625% senior notes due 2016, net	170		169.9
	6.5% senior notes due 2016, net	372.6		372.6
	4.75% senior notes due 2017	350		350
	3.625% senior notes due 2018	400		400
	3.75% senior notes due 2019	500		500
	4.0% senior notes due 2020	500		—
	4.375% senior notes due 2022	350		350
	4.75% senior notes due 2023	300		300
	5.75% senior notes due 2023	400		400
	Other secured notes	30.4		23.4
		$	3,548.00	$	3,323.60
	Financial Services:
	Mortgage repurchase facility, maturing 2016	$	397.5	$	359.2

Mortgage_Loans_Tables

Mortgage Loans (Tables)	6 Months Ended
	Mar. 31, 2015
Mortgage Loans on Real Estate [Abstract]
Schedule of other mortgage loans and real estate owned	At March 31, 2015 and September 30, 2014, the Company’s total other mortgage loans and real estate owned, before loss reserves, were as follows:
		March 31,		September 30,
		2015		2014
		(In millions)
	Other mortgage loans	$	45.3	$	41
	Real estate owned	0.5		0.7
		$	45.8	$	41.7
Schedule of mortgage loss reserves	The reserve balances at March 31, 2015 and September 30, 2014 were as follows:
		March 31,		September 30,
		2015		2014
		(In millions)
	Loss reserves related to:
	Other mortgage loans	$	1.6	$	1.7
	Real estate owned	0.1		0.1
	Loan repurchase and settlement obligations – known and expected	21.7		24.4
		$	23.4	$	26.2

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	6 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Numerator and denominator used to compute basic and diluted earnings per share	The following table sets forth the numerators and denominators used in the computation of basic and diluted earnings per share. Options to purchase 8.7 million and 9.1 million shares of common stock were excluded from the computation of diluted earnings per share for the 2015 and 2014 periods, respectively, because their effect would have been antidilutive.
		Three Months Ended				Six Months Ended
		March 31,				March 31,
		2015		2014		2015		2014
		(In millions)
	Numerator:
	Net income	$	147.9	$	131	$	290.4	$	254.1
	Effect of dilutive securities:
	Interest and amortization of issuance costs associated with convertible senior notes, net of tax	—		6.9		—		13.7
	Numerator for diluted earnings per share after assumed conversions	$	147.9	$	137.9	$	290.4	$	267.8
	Denominator:
	Denominator for basic earnings per share — weighted average common shares	365.8		324.3		365.4		323.7
	Effect of dilutive securities:
	Employee stock awards	3.6		3.4		3.4		3.1
	Convertible senior notes	—		38.6		—		38.6
	Denominator for diluted earnings per share — adjusted weighted average common shares	369.4		366.3		368.8		365.4
	Basic net income per common share	$	0.4	$	0.4	$	0.79	$	0.79
	Net income per common share assuming dilution	$	0.4	$	0.38	$	0.79	$	0.73

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	6 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Changes in warranty liability	Changes in the Company’s warranty liability during the three and six months ended March 31, 2015 and 2014 were as follows:
			Three Months Ended							Six Months Ended
			March 31,							March 31,
			2015				2014			2015			2014
			(In millions)
	Warranty liability, beginning of period		$	65.9			$	56.7		$	65.7		$	56.9
	Warranties issued		10.4				7.4			20.5			14.6
	Changes in liability for pre-existing warranties		2.8				1.1			0.6			2.1
	Settlements made		(7.5		)		(7.9		)	(15.2		)	(16.3		)
	Warranty liability, end of period		$	71.6			$	57.3		$	71.6		$	57.3
Rollforward of the reserve of legal claims	Changes in the Company’s legal claims reserves during the six months ended March 31, 2015 and 2014 were as follows:
		Six Months Ended
		March 31,
		2015				2014
		(In millions)
	Reserves for legal claims, beginning of period	$	456.9			$	482
	Increase (decrease) in reserves	20.8				(17.4		)
	Payments	(28.3		)		(10.4		)
	Reserves for legal claims, end of period	$	449.4			$	454.2

Other_Assets_and_Accrued_Expen1

Other Assets and Accrued Expenses and Other Liabilities (Tables)	6 Months Ended
	Mar. 31, 2015
Other Assets and Accrued Expenses and Other Liabilities [Abstract]
Homebuilding other assets	The Company’s homebuilding other assets at March 31, 2015 and September 30, 2014 were as follows:
		March 31,		September 30,
		2015		2014
		(In millions)
	Insurance receivables	$	134.1	$	138.4
	Earnest money and refundable deposits	121		113.3
	Accounts and notes receivable	43		38.6
	Prepaid assets	51.5		55.4
	Rental properties	48.6		48.7
	Debt securities collateralized by residential real estate	20.8		20.8
	Other assets	23.4		25.9
		$	442.4	$	441.1
Homebuilding accrued expenses and other liabilities	The Company’s homebuilding accrued expenses and other liabilities at March 31, 2015 and September 30, 2014 were as follows:
		March 31,		September 30,
		2015		2014
		(In millions)
	Reserves for legal claims	$	449.4	$	456.9
	Employee compensation and related liabilities	144.2		150.8
	Warranty liability	71.6		65.7
	Accrued interest	31		29.1
	Federal and state income tax liabilities	6.6		12.8
	Inventory related accruals	29.7		36.1
	Homebuyer deposits	54.8		49.5
	Accrued property taxes	17.5		29.1
	Other liabilities	42.9		45
		$	847.7	$	875

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair value measurements of assets and liabilities on a recurring basis	The following tables summarize the Company’s assets and liabilities measured at fair value on a recurring basis at March 31, 2015 and September 30, 2014, and the changes in the fair value of the Level 3 assets during the six months ended March 31, 2015.
				Fair Value at March 31, 2015
			Balance Sheet Location	Level 1			Level 2			Level 3				Total
				(In millions)
	Homebuilding:
	Debt securities collateralized by residential real estate (a)		Other assets	$	—		$	—		$	20.8			$	20.8
	Financial Services:
	Mortgage loans held for sale (b)		Mortgage loans held for sale	—			504.2			13.4				517.6
	Derivatives not designated as hedging instruments (c):
	Interest rate lock commitments		Other assets	—			4.6			—				4.6
	Forward sales of MBS		Other liabilities	—			(4.7		)	—				(4.7		)
	Best-efforts and mandatory commitments		Other liabilities	—			(0.5		)	—				(0.5		)
				Fair Value at September 30, 2014
			Balance Sheet Location	Level 1			Level 2			Level 3				Total
				(In millions)
	Homebuilding:
	Debt securities collateralized by residential real estate (a)		Other assets	$	—		$	—		$	20.8			$	20.8
	Financial Services:
	Mortgage loans held for sale (b)		Mortgage loans held for sale	—			464.9			12				476.9
	Derivatives not designated as hedging instruments (c):
	Interest rate lock commitments		Other assets	—			2.4			—				2.4
	Forward sales of MBS		Other liabilities	—			(1.9		)	—				(1.9		)
	Best-efforts and mandatory commitments		Other liabilities	—			(0.1		)	—				(0.1		)
		Level 3 Assets at Fair Value for the
		Six Months Ended March 31, 2015
		Balance at September 30, 2014			Net realized and unrealized gains (losses)			Purchases			Sales and Settlements				Principal Reductions		Net transfers in (out)		Balance at March 31, 2015
																	of Level 3
		(In millions)
	Debt securities collateralized by residential real estate (a)	$	20.8		$	—		$	—		$	—			$	—	$	—	$	20.8
	Mortgage loans held for sale (b)	12			0.4			—			(0.7		)		—		1.7		13.4
	(a)	In October 2012, the Company purchased defaulted debt securities which are secured by residential real estate. These securities, which are included in other assets in the consolidated balance sheets, are classified as available for sale and are reflected at fair value. The fair value of these securities was determined by estimating the future cash flows of the securities and the residential real estate utilizing discount rates of 6% and 18%, respectively. Unrealized gains or losses on these securities, net of tax, are recorded in accumulated other comprehensive income (loss) in the consolidated balance sheets. The Company has entered into an agreement to purchase this residential real estate parcel and all additional defaulted debt securities associated with the parcel, in order to develop the property and build and sell homes. In April 2015, the Company completed this purchase transaction for $19.6 million in cash. The purchase price will be allocated to the land and the debt securities acquired in the third quarter of fiscal 2015.
	(b)	Mortgage loans held for sale are reflected at fair value. Interest income earned on mortgage loans held for sale is based on contractual interest rates and included in financial services interest and other income. Mortgage loans held for sale at March 31, 2015 includes $13.4 million of originated loans for which the Company elected the fair value option upon origination and which the Company has not sold into the secondary market, but plans to sell as market conditions permit. The fair value of these mortgage loans held for sale is generally calculated considering the secondary market and adjusted for the value of the underlying collateral, including interest rate risk, liquidity risk and prepayment risk.
	(c)	Fair value measurements of these derivatives represent changes in fair value, as calculated by reference to quoted prices for similar assets, and are reflected in the balance sheet. Changes in these fair values during the periods presented are included in financial services revenues in the consolidated statements of operations.
Fair value measurements of assets on a non-recurring basis	The following table summarizes the Company’s assets measured at fair value on a nonrecurring basis at March 31, 2015 and September 30, 2014:
				Fair Value at March 31, 2015			Fair Value at September 30, 2014
			Balance Sheet Location	Level 3			Level 3
				(In millions)
	Homebuilding:
	Inventory held and used (a) (b)		Inventories	$	21.6		$	19.2
	Inventory available for sale (a) (c)		Inventories	1.4			8.2
	Financial Services:
	Other mortgage loans (a) (d)		Other assets	14.6			16
	Real estate owned (a) (d)		Other assets	0.2			0.5
	_______________________________________
	(a)	The fair values included in the table above represent only those assets whose carrying values were adjusted to fair value in the respective quarter.
	(b)	In performing its impairment analysis of communities, discount rates ranging from 12% to 18% were used in the periods presented.
	(c)	The fair value of inventory available for sale was determined based on recent offers received from outside third parties, comparable sales or actual contracts.
	(d)	The fair values of other mortgage loans and real estate owned are determined based on the value of the underlying collateral.
Fair Value, by Balance Sheet Grouping [Table Text Block]	For the financial assets and liabilities that the Company does not reflect at fair value, the following tables present both their respective carrying value and fair value at March 31, 2015 and September 30, 2014:
		Carrying Value			Fair Value at March 31, 2015
					Level 1			Level 2			Level 3				Total
		(In millions)
	Homebuilding:
	Cash and cash equivalents (a)	$	665.8		$	665.8		$	—		$	—			$	665.8
	Restricted cash (a)	10.4			10.4			—			—				10.4
	Revolving credit facility (a)	175			—			—			175				175
	Senior notes (b)	3,342.60			—			3,432.90			—				3,432.90
	Other secured notes (a)	30.4			—			—			30.4				30.4
	Financial Services:
	Cash and cash equivalents (a)	31.9			31.9			—			—				31.9
	Mortgage repurchase facility (a)	397.5			—			—			397.5				397.5
		Carrying Value			Fair Value at September 30, 2014
					Level 1			Level 2			Level 3				Total
		(In millions)
	Homebuilding:
	Cash and cash equivalents (a)	$	632.5		$	632.5		$	—		$	—			$	632.5
	Restricted cash (a)	10			10			—			—				10
	Revolving credit facility (a)	300			—			—			300				300
	Senior notes (b)	3,000.20			—			3,033.80			—				3,033.80
	Other secured notes (a)	23.4			—			—			23.4				23.4
	Financial Services:
	Cash and cash equivalents (a)	29.3			29.3			—			—				29.3
	Mortgage repurchase facility (a)	359.2			—			—			359.2				359.2
	_______________________________________
	(a)	The fair value approximates carrying value due to its short-term nature, short maturity or floating interest rate terms, as applicable.
	(b)	The fair value is determined based on quoted market prices of recent transactions of the notes, which is classified as Level 2 within the fair value hierarchy.

Supplemental_Guarantor_Informa1

Supplemental Guarantor Information (Tables)	6 Months Ended
	Mar. 31, 2015
Supplemental Guarantor Information [Abstract]
Condensed Financial Statements	Consolidating Balance Sheet
	March 31, 2015
		D.R.			Guarantor			Non-Guarantor			Eliminations			Total
		Horton, Inc.			Subsidiaries			Subsidiaries
		(In millions)
	ASSETS
	Cash and cash equivalents	$	522.1		$	96		$	79.6		$	—		$	697.7
	Restricted cash	7			2.3			1.1			—			10.4
	Investments in subsidiaries	3,118.50			—			—			(3,118.5		)	—
	Inventories	2,768.10			5,344.20			24.6			—			8,136.90
	Deferred income taxes	178.5			358.5			10.7			—			547.7
	Property and equipment, net	56.8			50			87			—			193.8
	Other assets	168.6			246.8			98.8			—			514.2
	Mortgage loans held for sale	—			—			517.6			—			517.6
	Goodwill	—			94.8			—			—			94.8
	Intercompany receivables	2,484.80			—			—			(2,484.8		)	—
	Total Assets	$	9,304.40		$	6,192.60		$	819.4		$	(5,603.3	)	$	10,713.10
	LIABILITIES & EQUITY
	Accounts payable and other liabilities	$	367.1		$	842.9		$	136.6		$	—		$	1,346.60
	Intercompany payables	—			2,373.10			111.7			(2,484.8		)	—
	Notes payable	3,519.20			10.6			415.7			—			3,945.50
	Total Liabilities	3,886.30			3,226.60			664			(2,484.8		)	5,292.10
	Total stockholders’ equity	5,418.10			2,966.00			152.5			(3,118.5		)	5,418.10
	Noncontrolling interests	—			—			2.9			—			2.9
	Total Equity	5,418.10			2,966.00			155.4			(3,118.5		)	5,421.00
	Total Liabilities & Equity	$	9,304.40		$	6,192.60		$	819.4		$	(5,603.3	)	$	10,713.10
	NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
	Consolidating Balance Sheet
	September 30, 2014
		D.R.			Guarantor			Non-Guarantor			Eliminations			Total
		Horton, Inc.			Subsidiaries			Subsidiaries
		(In millions)
	ASSETS
	Cash and cash equivalents	$	497.4		$	89.5		$	74.9		$	—		$	661.8
	Restricted cash	6.8			2.1			1.1			—			10
	Investments in subsidiaries	2,878.20			—			—			(2,878.2		)	—
	Inventories	2,675.90			5,014.30			10.3			—			7,700.50
	Deferred income taxes	189.9			364.4			10.7			—			565
	Property and equipment, net	51.9			49.1			89.8			—			190.8
	Other assets	163			250.8			88.9			—			502.7
	Mortgage loans held for sale	—			—			476.9			—			476.9
	Goodwill	—			94.8			—			—			94.8
	Intercompany receivables	2,364.20			—			—			(2,364.2		)	—
	Total Assets	$	8,827.30		$	5,865.00		$	752.6		$	(5,242.4	)	$	10,202.50
	LIABILITIES & EQUITY
	Accounts payable and other liabilities	$	409.8		$	853.3		$	136.9		$	—		$	1,400.00
	Intercompany payables	—			2,282.20			82			(2,364.2		)	—
	Notes payable	3,301.70			3.4			377.7			—			3,682.80
	Total Liabilities	3,711.50			3,138.90			596.6			(2,364.2		)	5,082.80
	Total stockholders’ equity	5,115.80			2,726.10			152.1			(2,878.2		)	5,115.80
	Noncontrolling interests	—			—			3.9			—			3.9
	Total Equity	5,115.80			2,726.10			156			(2,878.2		)	5,119.70
	Total Liabilities & Equity	$	8,827.30		$	5,865.00		$	752.6		$	(5,242.4	)	$	10,202.50
	NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
	Consolidating Statement of Operations
	Three Months Ended March 31, 2015
		D.R.			Guarantor			Non-Guarantor			Eliminations			Total
		Horton, Inc.			Subsidiaries			Subsidiaries
		(In millions)
	Homebuilding:
	Revenues	$	727		$	1,611.50		$	—		$	—		$	2,338.50
	Cost of sales	593.7			1,297.80			0.5			—			1,892.00
	Gross profit (loss)	133.3			313.7			(0.5		)	—			446.5
	Selling, general and administrative expense	112.4			124.4			5.6			—			242.4
Equity in (income) of subsidiaries	(208.5		)	—			—			208.5			—
Other (income)	(0.7		)	(1.1		)	(2.7		)	—			(4.5		)
Homebuilding pre-tax income (loss)	230.1			190.4			(3.4		)	(208.5		)	208.6
Financial Services:
Revenues, net of recourse expense	—			—			59.5			—			59.5
General and administrative expense	—			—			40.7			—			40.7
Interest and other (income)	—			—			(2.7		)	—			(2.7		)
Financial services pre-tax income	—			—			21.5			—			21.5
Income before income taxes	230.1			190.4			18.1			(208.5		)	230.1
Income tax expense	82.2			67.7			6.9			(74.6		)	82.2
Net income	$	147.9		$	122.7		$	11.2		$	(133.9	)	$	147.9
Comprehensive income	$	147.9		$	122.7		$	11.2		$	(133.9	)	$	147.9
NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
Consolidating Statement of Operations
Six Months Ended March 31, 2015
	D.R.			Guarantor			Non-Guarantor			Eliminations			Total
	Horton, Inc.			Subsidiaries			Subsidiaries
	(In millions)
Homebuilding:
Revenues	$	1,423.80		$	3,167.70		$	—		$	—		$	4,591.50
Cost of sales	1,147.70			2,554.90			3.9			—			3,706.50
Gross profit (loss)	276.1			612.8			(3.9		)	—			885
Selling, general and administrative expense	222.6			245.6			12.2			—			480.4
Equity in (income) of subsidiaries	(396.3		)	—			—			396.3			—
Other (income)	(1.0		)	(2.5		)	(6.6		)	—			(10.1		)
Homebuilding pre-tax income (loss)	450.8			369.7			(9.5		)	(396.3		)	414.7
Financial Services:
Revenues, net of recourse expense	—			—			109.2			—			109.2
General and administrative expense	—			—			78.6			—			78.6
Interest and other (income)	—			—			(5.5		)	—			(5.5		)
Financial services pre-tax income	—			—			36.1			—			36.1
Income before income taxes	450.8			369.7			26.6			(396.3		)	450.8
Income tax expense	160.4			130.9			10.3			(141.2		)	160.4
Net income	$	290.4		$	238.8		$	16.3		$	(255.1	)	$	290.4
Comprehensive income	$	290.4		$	238.8		$	16.3		$	(255.1	)	$	290.4
NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
Consolidating Statement of Operations
Three Months Ended March 31, 2014
	D.R.			Guarantor			Non-Guarantor			Eliminations			Total
	Horton, Inc.			Subsidiaries			Subsidiaries
	(In millions)
Homebuilding:
Revenues	$	574.1		$	1,119.70		$	2.8		$	—		$	1,696.60
Cost of sales	453.5			864			2.3			—			1,319.80
Gross profit	120.6			255.7			0.5			—			376.8
Selling, general and administrative expense	87.9			97.7			2.3			—			187.9
Equity in (income) of subsidiaries	(169.0		)	—			—			169			—
Other (income)	(0.2		)	(1.1		)	(1.5		)	—			(2.8		)
Homebuilding pre-tax income (loss)	201.9			159.1			(0.3		)	(169.0		)	191.7
Financial Services:
Revenues, net of recourse expense	—			—			38.4			—			38.4
General and administrative expense	—			—			30.2			—			30.2
Interest and other (income)	—			—			(2.0		)	—			(2.0		)
Financial services pre-tax income	—			—			10.2			—			10.2
Income before income taxes	201.9			159.1			9.9			(169.0		)	201.9
Income tax expense	70.9			55.9			3.4			(59.3		)	70.9
Net income	$	131		$	103.2		$	6.5		$	(109.7	)	$	131
Comprehensive income	$	131		$	103.5		$	6.5		$	(109.7	)	$	131.3
NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
Consolidating Statement of Operations
Six Months Ended March 31, 2014
	D.R.			Guarantor			Non-Guarantor			Eliminations			Total
	Horton, Inc.			Subsidiaries			Subsidiaries
	(In millions)
Homebuilding:
Revenues	$	1,126.20		$	2,200.00		$	6.1		$	—		$	3,332.30
Cost of sales	883			1,704.50			6			—			2,593.50
Gross profit	243.2			495.5			0.1			—			738.8
Selling, general and administrative expense	176.9			190.2			4.2			—			371.3
Equity in (income) of subsidiaries	(324.6		)	—			—			324.6			—
Other (income)	(0.7		)	(2.0		)	(3.4		)	—			(6.1		)
Homebuilding pre-tax income (loss)	391.6			307.3			(0.7		)	(324.6		)	373.6
Financial Services:
Revenues, net of recourse expense	—			—			73.3			—			73.3
General and administrative expense	—			—			60			—			60
Interest and other (income)	—			—			(4.7		)	—			(4.7		)
Financial services pre-tax income	—			—			18			—			18
Income before income taxes	391.6			307.3			17.3			(324.6		)	391.6
Income tax expense	137.5			107.9			6			(113.9		)	137.5
Net income	$	254.1		$	199.4		$	11.3		$	(210.7	)	$	254.1
Comprehensive income	$	254.1		$	199.7		$	11.3		$	(210.7	)	$	254.4
NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
Consolidating Statement of Cash Flows
Six Months Ended March 31, 2015
	D.R.			Guarantor			Non-Guarantor			Eliminations			Total
	Horton, Inc.			Subsidiaries			Subsidiaries
	(In millions)
OPERATING ACTIVITIES
Net cash used in operating activities	$	(35.5	)	$	(74.0	)	$	(44.3	)	$	(15.0	)	$	(168.8	)
INVESTING ACTIVITIES
(Purchases of) proceeds from property and equipment	(15.0		)	(11.0		)	2			—			(24.0		)
Increase in restricted cash	(0.2		)	(0.2		)	—			—			(0.4		)
Net principal increase of other mortgage loans and real estate owned	—			—			(4.9		)	—			(4.9		)
Intercompany advances	(120.9		)	—			—			120.9			—
Net cash used in investing activities	(136.1		)	(11.2		)	(2.9		)	120.9			(29.3		)
FINANCING ACTIVITIES
Proceeds from notes payable	1,312.00			—			38.3			—			1,350.30
Repayment of notes payable	(1,097.7		)	(0.3		)	(0.3		)	—			(1,098.3		)
Intercompany advances	—			92			28.9			(120.9		)	—
Proceeds from stock associated with certain employee benefit plans	21			—			—			—			21
Excess income tax benefit from employee stock awards	6.7			—			—			—			6.7
Cash dividends paid	(45.7		)	—			(15.0		)	15			(45.7		)
Net cash provided by financing activities	196.3			91.7			51.9			(105.9		)	234
Increase in cash and cash equivalents	24.7			6.5			4.7			—			35.9
Cash and cash equivalents at beginning of period	497.4			89.5			74.9			—			661.8
Cash and cash equivalents at end of period	$	522.1		$	96		$	79.6		$	—		$	697.7
NOTE O – SUPPLEMENTAL GUARANTOR INFORMATION - (Continued)
Consolidating Statement of Cash Flows
Six Months Ended March 31, 2014
	D.R.			Guarantor			Non-Guarantor			Eliminations			Total
	Horton, Inc.			Subsidiaries			Subsidiaries
	(In millions)
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	$	(169.9	)	$	(118.9	)	$	63		$	(40.0	)	$	(265.8	)
INVESTING ACTIVITIES
Purchases of property and equipment	(12.3		)	(15.1		)	(5.4		)	—			(32.8		)
(Increase) decrease in restricted cash	(2.1		)	—			0.1			—			(2.0		)
Net principal increase of other mortgage loans and real estate owned	—			—			(1.7		)	—			(1.7		)
Intercompany advances	(157.4		)	—			—			157.4			—
Payments related to acquisition of a business	(34.5		)	—			—			—			(34.5		)
Net cash used in investing activities	(206.3		)	(15.1		)	(7.0		)	157.4			(71.0		)
FINANCING ACTIVITIES
Proceeds from notes payable	497			—			—			—			497
Repayment of notes payable	(148.8		)	—			(14.8		)	—			(163.6		)
Intercompany advances	—			158.6			(1.2		)	(157.4		)	—
Proceeds from stock associated with certain employee benefit plans	29.6			—			—			—			29.6
Excess income tax benefit from employee stock awards	1.9			—			—			—			1.9
Cash dividends paid	(12.1		)	—			(40.0		)	40			(12.1		)
Net cash provided by (used in) financing activities	367.6			158.6			(56.0		)	(117.4		)	352.8
(Decrease) increase in cash and cash equivalents	(8.6		)	24.6			—			—			16
Cash and cash equivalents at beginning of period	871.4			38.4			67.6			—			977.4
Cash and cash equivalents at end of period	$	862.8		$	63		$	67.6		$	—		$	993.4

Basis_of_Presentation_Details

Basis of Presentation (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013	Mar. 31, 2015	Sep. 30, 2014
Business Information [Line Items]
Cash and Cash Equivalents, at Carrying Value	$993.40	$977.40	$697.70	$661.80
Homebuilding [Member]
Business Information [Line Items]
Earnest Money Deposits			64.4
Cash and Cash Equivalents, at Carrying Value			665.8	632.5
Homebuilding [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Business Information [Line Items]
Earnest Money Deposits			60.4	55.7
Cash and Cash Equivalents [Member]
Business Information [Line Items]
Prior Period Reclassification Adjustment	42	40.9
Subsidiaries [Member]
Business Information [Line Items]
Cash and Cash Equivalents, at Carrying Value			$40.50	$43.30

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended				6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014		Mar. 31, 2015		Mar. 31, 2014		Sep. 30, 2014
Homebuilding revenues:
Consolidated revenues	$2,398		$1,735		$4,700.70		$3,405.60
Income (Loss) before Income Taxes
Income (loss) before income taxes	230.1	[1]	201.9	[1]	450.8	[1]	391.6	[1]
Homebuilding [Member]
Homebuilding revenues:
Total homebuilding revenues	2,338.50		1,696.60		4,591.50		3,332.30
Asset Impairment Charges [Abstract]
Inventory Write-down	8.1		2.3		12		2.3
Income (Loss) before Income Taxes
Income (loss) before income taxes	208.6	[1]	191.7	[1]	414.7	[1]	373.6	[1]
Homebuilding inventories
Total homebuilding inventory	8,136.90	[2]			8,136.90	[2]			7,700.50	[2]
Financial Services [Member]
Homebuilding revenues:
Financial Services Revenue	59.5		38.4		109.2		73.3
Income (Loss) before Income Taxes
Income (loss) before income taxes	21.5	[1]	10.2	[1]	36.1	[1]	18	[1]
East [Member] | Homebuilding [Member]
Homebuilding revenues:
Total homebuilding revenues	280.7		203.2		579.5		393.3
Asset Impairment Charges [Abstract]
Inventory Write-down	0		0		0		0
Income (Loss) before Income Taxes
Income (loss) before income taxes	13	[1]	14.2	[1]	39.4	[1]	25.7	[1]
Homebuilding inventories
Total homebuilding inventory	888.5	[2]			888.5	[2]			842.7	[2]
Midwest [Member] | Homebuilding [Member]
Homebuilding revenues:
Total homebuilding revenues	145		99.9		274.9		205.7
Asset Impairment Charges [Abstract]
Inventory Write-down	0		0		0		0
Income (Loss) before Income Taxes
Income (loss) before income taxes	10.2	[1]	9.1	[1]	15	[1]	19.1	[1]
Homebuilding inventories
Total homebuilding inventory	507	[2]			507	[2]			477.6	[2]
Southeast [Member] | Homebuilding [Member]
Homebuilding revenues:
Total homebuilding revenues	646.1		471.3		1,265.50		918.7
Asset Impairment Charges [Abstract]
Inventory Write-down	7.3		2.1		7.3		2.1
Income (Loss) before Income Taxes
Income (loss) before income taxes	58.7	[1]	52.2	[1]	116.7	[1]	103.7	[1]
Homebuilding inventories
Total homebuilding inventory	2,030.40	[2]			2,030.40	[2]			1,943	[2]
South Central [Member] | Homebuilding [Member]
Homebuilding revenues:
Total homebuilding revenues	628.2		430.4		1,207.90		851.5
Asset Impairment Charges [Abstract]
Inventory Write-down	0.7		0		0.7		0
Income (Loss) before Income Taxes
Income (loss) before income taxes	65.1	[1]	46.6	[1]	126.2	[1]	89	[1]
Homebuilding inventories
Total homebuilding inventory	1,927.70	[2]			1,927.70	[2]			1,742.50	[2]
Southwest [Member] | Homebuilding [Member]
Homebuilding revenues:
Total homebuilding revenues	70.9		63.1		146.3		133.8
Asset Impairment Charges [Abstract]
Inventory Write-down	0		0		0		0
Income (Loss) before Income Taxes
Income (loss) before income taxes	1.2	[1]	5.5	[1]	3.1	[1]	11.5	[1]
Homebuilding inventories
Total homebuilding inventory	290.6	[2]			290.6	[2]			292.9	[2]
West [Member] | Homebuilding [Member]
Homebuilding revenues:
Total homebuilding revenues	567.6		428.7		1,117.40		829.3
Asset Impairment Charges [Abstract]
Inventory Write-down	0.1		0.2		4		0.2
Income (Loss) before Income Taxes
Income (loss) before income taxes	60.4	[1]	64.1	[1]	114.3	[1]	124.6	[1]
Homebuilding inventories
Total homebuilding inventory	2,240	[2]			2,240	[2]			2,169.40	[2]
Corporate and Unallocated [Member] | Homebuilding [Member]
Homebuilding inventories
Total homebuilding inventory	$252.70	[2],[3]			$252.70	[2],[3]			$232.40	[2],[3]
[1]	Expenses maintained at the corporate level consist primarily of interest and property taxes, which are capitalized and amortized to cost of sales or expensed directly, and the expenses related to operating the Company’s corporate office. The amortization of capitalized interest and property taxes is allocated to each segment based on the segment’s cost of sales, while those expenses associated with the corporate office are allocated to each segment based on the segment’s inventory balances.
[2]	Homebuilding inventories are the only assets included in the measure of homebuilding segment assets used by the Company’s chief operating decision makers.
[3]	Corporate and unallocated consists primarily of capitalized interest and property taxes.

Segment_Information_Details_Te

Segment Information (Details Textual) (Homebuilding [Member])	3 Months Ended
	Mar. 31, 2015
	Segments
	OperatingDivisions
	Market
	State
Homebuilding [Member]
Segment information [Abstract]
Number Of Home Building Operating Divisions	38
Number Of Homebuilding Reporting Segments	6
Number Of Housing Construction States	27
Number Of Housing Construction Markets	79

Inventory_Impairments_and_Land1

Inventory Impairments and Land Option Cost Write-Offs (Details) (Homebuilding [Member], USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Homebuilding [Member]
Inventory Impairments and Land Option Cost Write Offs [Abstract]
Carrying value of communities with impairment indicators	$424.20		$424.20
Impairment charges	8.1	2.3	12	2.3
Write-offs (recoveries) of earnest money deposits and pre-acquisition costs	$4.40	$2.10	$6.60	$4.80

Notes_Payable_Details

Notes Payable (Details) (USD $)	Mar. 31, 2015	Sep. 30, 2014
In Millions, unless otherwise specified
Unsecured:
Notes payable	$3,945.50	$3,682.80
Homebuilding [Member]
Unsecured:
Notes payable	3,548	3,323.60
Financial Services [Member]
Unsecured:
Assets Sold under Agreements to Repurchase, Repurchase Liability	397.5	359.2
Senior Note Seven [Member] | Homebuilding [Member]
Unsecured:
Stated interest rate	5.25%
Senior Note Twenty Six [Member] | Homebuilding [Member]
Unsecured:
Stated interest rate	3.63%
Senior Note Eight [Member] | Homebuilding [Member]
Unsecured:
Stated interest rate	5.63%
Senior Note Nine [Member] | Homebuilding [Member]
Unsecured:
Stated interest rate	6.50%
Senior Note Twenty Four [Member] | Homebuilding [Member]
Unsecured:
Stated interest rate	4.75%
Senior Note Twenty Nine [Member] | Homebuilding [Member]
Unsecured:
Stated interest rate	3.75%
Senior Note Member Thirty [Member] | Homebuilding [Member]
Unsecured:
Stated interest rate	4.00%
Senior Note Member Twenty Five [Member] | Homebuilding [Member]
Unsecured:
Stated interest rate	4.38%
Senior Note Twenty Seven [Member] | Homebuilding [Member]
Unsecured:
Stated interest rate	4.75%
SeniorNoteTwentyEight [Member] | Homebuilding [Member]
Unsecured:
Stated interest rate	5.75%
Unsecured Debt [Member] | Senior Note Seven [Member] | Homebuilding [Member]
Unsecured:
Notes payable	0	157.7
Unsecured Debt [Member] | Senior Note Twenty Six [Member] | Homebuilding [Member]
Unsecured:
Notes payable	400	400
Unsecured Debt [Member] | Senior Note Eight [Member] | Homebuilding [Member]
Unsecured:
Notes payable	170	169.9
Unsecured Debt [Member] | Senior Note Nine [Member] | Homebuilding [Member]
Unsecured:
Notes payable	372.6	372.6
Unsecured Debt [Member] | Senior Note Twenty Four [Member] | Homebuilding [Member]
Unsecured:
Notes payable	350	350
Unsecured Debt [Member] | Senior Note Twenty Nine [Member] | Homebuilding [Member]
Unsecured:
Notes payable	500	500
Unsecured Debt [Member] | Senior Note Member Thirty [Member] | Homebuilding [Member]
Unsecured:
Notes payable	500	0
Unsecured Debt [Member] | Senior Note Member Twenty Five [Member] | Homebuilding [Member]
Unsecured:
Notes payable	350	350
Unsecured Debt [Member] | Senior Note Twenty Seven [Member] | Homebuilding [Member]
Unsecured:
Notes payable	300	300
Unsecured Debt [Member] | SeniorNoteTwentyEight [Member] | Homebuilding [Member]
Unsecured:
Notes payable	400	400
Line of Credit [Member] | Homebuilding [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding	175	300
Secured Debt [Member] | Homebuilding [Member]
Unsecured:
Notes payable	$30.40	$23.40

Notes_Payable_Details_Textual

Notes Payable (Details Textual) (USD $)	0 Months Ended	3 Months Ended
	Aug. 01, 2014	Mar. 31, 2015	Sep. 30, 2014
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		$93,400,000
Homebuilding [Member]
Debt Instrument [Line Items]
Letter of Credit, Maximum Borrowing Capacity		0.5
Authorized repurchase of debt securities	500,000,000
Debt repurchase program, remaining authorized repurchase amount		500,000,000
Homebuilding [Member] | Senior Note Member Thirty [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.00%
Homebuilding [Member] | Senior Note Seven [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.25%
Homebuilding [Member] | 3.75% senior notes due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.75%
Homebuilding [Member] | Senior Note Eight [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.63%
Homebuilding [Member] | Senior Note Nine [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.50%
Homebuilding [Member] | Senior Note Twenty Four [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.75%
Homebuilding [Member] | Senior Note Twenty Six [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.63%
Homebuilding [Member] | Senior Note Twenty Seven [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.75%
Homebuilding [Member] | SeniorNoteTwentyEight [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.75%
Financial Services [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity		400,000,000
Line of Credit Facility, Maximum Borrowing Capacity		550,000,000
Line of credit facility additional borrowing capacity		450,000,000
Mortgage loans held for sale pledged under repurchase agreement		485,600,000
Mortgage loans, collateral value		469,600,000
Advance pay downs on mortgage repurchase facility		72,100,000
Assets Sold under Agreements to Repurchase, Repurchase Liability		397,500,000	359,200,000
Interest rate on mortgage repurchase facility		2.40%
Line of Credit [Member] | Homebuilding [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity		975,000,000
Line of Credit Facility, Maximum Borrowing Capacity		1,250,000,000
Line of Credit Facility, Amount Outstanding		175,000,000	300,000,000
Line of Credit Facility, Interest Rate at Period End		1.90%
Letters of Credit Outstanding, Amount		90,300,000
Unsecured Debt [Member] | Homebuilding [Member] | Senior Note Member Thirty [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		500,000,000
Debt Instrument, Interest Rate, Effective Percentage		4.20%
Unsecured Debt [Member] | Homebuilding [Member] | Senior Note Seven [Member]
Debt Instrument [Line Items]
Maturities of Senior Debt		$157,700,000

Capitalized_Interest_Details

Capitalized Interest (Details) (USD $)	3 Months Ended				6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014		Mar. 31, 2015		Mar. 31, 2014
Rollforward of capitalized interest
Capitalized interest, beginning of period	$205.20		$161.10		$198.50		$137.10
Interest incurred	42.6	[1]	49.5	[1]	83	[1]	98.8	[1]
Interest expensed:
Amortized to cost of sales	-35.6		-26.9		-69.2		-52.2
Capitalized Interest Costs Written Off With Inventory Impairments	0		0		-0.1		0
Capitalized interest, end of period	212.2		183.7		212.2		183.7
Financial Services [Member]
Rollforward of capitalized interest
Interest incurred	$1.60		$0.90		$3.10		$1.80
[1]	Interest incurred includes interest incurred on the Company's financial services mortgage repurchase facility of $1.6 million and $3.1 million in the three and six months ended March 31, 2015, respectively, and $0.9 million and $1.8 million in the same periods of 2014.

Mortgage_Loans_Details

Mortgage Loans (Details) (Financial Services [Member], USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014
Loans Receivable [Line Items]
Mortgage loans held for sale	$517,600,000		$517,600,000		$476,900,000
Principal Amount Outstanding on Loans Held-for-sale or Securitization or Asset-backed Financing Arrangement	502,000,000		502,000,000		466,600,000
Payments for Origination of Mortgage Loans Held-for-sale			2,200,000,000	1,600,000,000
Net gain on sales of loans	40,800,000	23,900,000	73,600,000	44,400,000
Concentration Risk, Percentage			84.00%
Percentage Of Mortgage Loans Sold To Major Purchasers			40.00%
Proceeds from Sale of Mortgage Loans Held-for-sale			2,200,000,000	1,600,000,000
Mortgage Loans on Real Estate	45,300,000		45,300,000		41,000,000
Real Estate Acquired Through Foreclosure	500,000		500,000		700,000
Other Real Estate, Foreclosed Assets, and Repossessed Assets	45,800,000		45,800,000		41,700,000
Uncommitted Loans [Member]
Loans Receivable [Line Items]
Mortgage loans held for sale	373,400,000		373,400,000		348,600,000
Hedging Instruments related to IRLCs [Member]
Loans Receivable [Line Items]
Notional amounts of hedging instruments, Total	$373,300,000		$373,300,000		$348,200,000

Mortgage_Loans_Details_1

Mortgage Loans (Details 1) (Financial Services [Member], USD $)	Mar. 31, 2015	Sep. 30, 2014
In Millions, unless otherwise specified
Mortgage Loans on Real Estate, Write-down or Reserve [Line Items]
Mortgage Loans on Real Estate	$45.30	$41
Real Estate Acquired Through Foreclosure	0.5	0.7
Other Real Estate, Foreclosed Assets, and Repossessed Assets	45.8	41.7
Schedule of mortgage loss reserves
Loans and Leases Receivable, Allowance	23.4	26.2
Mortgage Loans on Real Estate [Member]
Schedule of mortgage loss reserves
Loans and Leases Receivable, Allowance	1.6	1.7
Real Estate [Member]
Schedule of mortgage loss reserves
Loans and Leases Receivable, Allowance	0.1	0.1
Obligation to Repurchase Receivables Sold [Member]
Schedule of mortgage loss reserves
Loans and Leases Receivable, Allowance	$21.70	$24.40

Mortgage_Loans_Details_Textual

Mortgage Loans (Details Textual) (Financial Services [Member], USD $)	Mar. 31, 2015	Sep. 30, 2014
In Millions, unless otherwise specified
Interest rate lock commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	$440.10	$303.20
Best-efforts and mandatory commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	46	28.2
Hedging Instruments related to IRLCs [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	373.3	348.2
Derivative, Notional Amount	$351.70	$243.80

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014
Income Tax Disclosures [Line Items]
Deferred Tax Assets, Valuation Allowance	$30.90		$30.90		$31.10
Income tax expense (benefit)	82.2	70.9	160.4	137.5
Effective Income Tax Rate Reconciliation, Percent	35.70%	35.10%	35.60%	35.10%
Deferred tax assets net of DTL	$578.60		$578.60		$596.10

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Number of shares excluded from computation of earnings per share			8.7	9.1
Earnings Per Share Reconciliation [Abstract]
Net income	$147.90	$131	$290.40	$254.10
Interest expense and amortization of issuance costs associated with convertible senior notes	0	6.9	0	13.7
Numerator for diluted earnings per share after assumed conversions	$147.90	$137.90	$290.40	$267.80
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Denominator for basic earnings per share - weighted average common shares	365.8	324.3	365.4	323.7
Employee stock awards	3.6	3.4	3.4	3.1
Incremental Common Shares Attributable to Conversion of Debt Securities	0	38.6	0	38.6
Denominator for diluted earnings per share - adjusted weighted average common shares	369.4	366.3	368.8	365.4
Earnings Per Share, Basic	$0.40	$0.40	$0.79	$0.79
Earnings Per Share, Diluted	$0.40	$0.38	$0.79	$0.73

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2015	Aug. 01, 2014
Dividends, Common Stock [Abstract]
Cash dividends declared per common share (in dollars per share)	$0.06	$0.04	$0.13	$0.04
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Amount remaining under stock repurchase authorization	$100		$100
Amount of stock repurchase authorization						$100
Scenario, Forecast [Member]
Dividends, Common Stock [Abstract]
Cash dividends declared per common share (in dollars per share)					$0.06

Employee_Benefit_Plans_Details

Employee Benefit Plans (Details) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2015	Mar. 31, 2015
Restricted Stock Units (RSUs) [Member] | November Two Thousand Fourteen Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense			$0.10
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		30,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$21.88
Restricted Stock Units (RSUs) [Member] | March Two Thousand Fifteen Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense		3.8	3.8
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	2,000,000
RSU Grant Recipients	570
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$26.09
Performance Shares [Member] | November Two Thousand Fourteen Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense		$0.70	$1.30
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		290,000
Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Units Vesting Upon Achieving Performance Criteria Range Low		0.00%
Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Units Vesting Upon Achieving Performance Criteria Range High		200.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$23.62

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (Homebuilding [Member], USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Homebuilding [Member]
Changes in warranty liability
Warranty liability, beginning of period	$65.90	$56.70	$65.70	$56.90
Warranties issued	10.4	7.4	20.5	14.6
Changes in liability for pre-existing warranties	2.8	1.1	0.6	2.1
Settlements made	-7.5	-7.9	-15.2	-16.3
Warranty liability, end of period	$71.60	$57.30	$71.60	$57.30

Commitments_and_Contingencies_2

Commitments and Contingencies Commitments and Contingencies (Details 1) (Homebuilding [Member], USD $)	6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Homebuilding [Member]
Rollforward of reserves for legal claims
Reserves for legal claims, beginning of period	$456.90	$482
Payments	-28.3	-10.4
Increase (decrease) in reserve	20.8	-17.4
Reserves for legal claims, end of period	$449.40	$454.20

Commitments_and_Contingencies_3

Commitments and Contingencies (Details Textual) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014	Sep. 30, 2013
Commitments and Contingencies [Abstract]
Surety Bonds	$945.20
Outstanding letters of credit	93.4
Homebuilding [Member]
Commitments and Contingencies [Abstract]
Liabilities for various claims, complaints and other legal actions	449.4	454.2	456.9	482
Expenses related to legal claims	20.4	5.4
Estimated insurance recoveries related to legal claims	134.1	136.1	138.4
Earnest Money Deposits	64.4
Remaining purchase price of land under option contracts	2,000
Construction defect portion of loss contingency accrual	99.00%		99.00%
Cash Deposits [Member] | Homebuilding [Member]
Commitments and Contingencies [Abstract]
Earnest Money Deposits	56.9
Promissory Notes and Surety Bonds [Member] | Homebuilding [Member]
Commitments and Contingencies [Abstract]
Earnest Money Deposits	7.5
Line of Credit [Member] | Homebuilding [Member]
Commitments and Contingencies [Abstract]
Outstanding letters of credit	90.3
Letter of Credit Two [Member]
Commitments and Contingencies [Abstract]
Outstanding letters of credit	3.1
Option Contracts Subject to Specific Performance Clauses [Member] | Homebuilding [Member]
Commitments and Contingencies [Abstract]
Remaining purchase price of land under option contracts	$25.70

Other_Assets_and_Accrued_Expen2

Other Assets and Accrued Expenses and Other Liabilities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013
In Millions, unless otherwise specified
Homebuilding other assets
Homebuilding other assets	$514.20		$502.70
Homebuilding [Member]
Homebuilding other assets
Insurance receivables	134.1		138.4	136.1
Earnest money and refundable deposits	121		113.3
Accounts and notes receivable	43		38.6
Prepaid assets	51.5		55.4
Rental Properties	48.6		48.7
Other Investments	20.8		20.8
Other assets	23.4		25.9
Homebuilding other assets	442.4		441.1
Homebuilding accrued expenses and other liabilities
Construction defect and other litigation liabilities	449.4		456.9	454.2		482
Employee compensation and related liabilities	144.2		150.8
Warranty liability	71.6	65.9	65.7	57.3	56.7	56.9
Accrued interest	31		29.1
Federal and state income tax liabilities	6.6		12.8
Construction Payable	29.7		36.1
Customer Deposits, Current	54.8		49.5
Accrual for Taxes Other than Income Taxes, Current	17.5		29.1
Other liabilities	42.9		45
Homebuilding accrued expenses and other liabilities	$847.70		$875

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Mar. 31, 2015		Sep. 30, 2014
In Millions, unless otherwise specified
Homebuilding [Member]
Fair value balance sheet items measured on a recurring basis
Other Investments	$20.80		$20.80
Homebuilding [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair value balance sheet items measured on a recurring basis
Other Investments	0	[1]	0	[1]
Homebuilding [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair value balance sheet items measured on a recurring basis
Other Investments	0	[1]	0	[1]
Homebuilding [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair value balance sheet items measured on a recurring basis
Other Investments	20.8	[1]	20.8	[1]
Homebuilding [Member] | Estimated Fair Value [Member] | Fair Value, Measurements, Recurring [Member]
Fair value balance sheet items measured on a recurring basis
Other Investments	20.8	[1]	20.8	[1]
Financial Services [Member]
Fair value balance sheet items measured on a recurring basis
Mortgage loans held for sale	517.6		476.9
Financial Services [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair value balance sheet items measured on a recurring basis
Mortgage loans held for sale	0	[2]	0	[2]
Financial Services [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Interest rate lock commitments [Member]
Fair value balance sheet items measured on a recurring basis
Fair value of interest rate derivatives	0	[3]	0	[3]
Financial Services [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Forward sales of MBS [Member]
Fair value balance sheet items measured on a recurring basis
Fair value of interest rate derivatives	0	[3]	0	[3]
Financial Services [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Best-efforts and mandatory commitments [Member]
Fair value balance sheet items measured on a recurring basis
Fair value of interest rate derivatives	0	[3]	0	[3]
Financial Services [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair value balance sheet items measured on a recurring basis
Mortgage loans held for sale	504.2	[2]	464.9	[2]
Financial Services [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Interest rate lock commitments [Member]
Fair value balance sheet items measured on a recurring basis
Fair value of interest rate derivatives	4.6	[3]	2.4	[3]
Financial Services [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Forward sales of MBS [Member]
Fair value balance sheet items measured on a recurring basis
Fair value of interest rate derivatives	-4.7	[3]	-1.9	[3]
Financial Services [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Best-efforts and mandatory commitments [Member]
Fair value balance sheet items measured on a recurring basis
Fair value of interest rate derivatives	-0.5	[3]	-0.1	[3]
Financial Services [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair value balance sheet items measured on a recurring basis
Mortgage loans held for sale	13.4	[2]	12	[2]
Financial Services [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Interest rate lock commitments [Member]
Fair value balance sheet items measured on a recurring basis
Fair value of interest rate derivatives	0	[3]	0	[3]
Financial Services [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Forward sales of MBS [Member]
Fair value balance sheet items measured on a recurring basis
Fair value of interest rate derivatives	0	[3]	0	[3]
Financial Services [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Best-efforts and mandatory commitments [Member]
Fair value balance sheet items measured on a recurring basis
Fair value of interest rate derivatives	0	[3]	0	[3]
Financial Services [Member] | Estimated Fair Value [Member] | Fair Value, Measurements, Recurring [Member]
Fair value balance sheet items measured on a recurring basis
Mortgage loans held for sale	517.6	[2]	476.9	[2]
Financial Services [Member] | Estimated Fair Value [Member] | Fair Value, Measurements, Recurring [Member] | Interest rate lock commitments [Member]
Fair value balance sheet items measured on a recurring basis
Fair value of interest rate derivatives	4.6	[3]	2.4	[3]
Financial Services [Member] | Estimated Fair Value [Member] | Fair Value, Measurements, Recurring [Member] | Forward sales of MBS [Member]
Fair value balance sheet items measured on a recurring basis
Fair value of interest rate derivatives	-4.7	[3]	-1.9	[3]
Financial Services [Member] | Estimated Fair Value [Member] | Fair Value, Measurements, Recurring [Member] | Best-efforts and mandatory commitments [Member]
Fair value balance sheet items measured on a recurring basis
Fair value of interest rate derivatives	($0.50)	[3]	($0.10)	[3]
[1]	In October 2012, the Company purchased defaulted debt securities which are secured by residential real estate. These securities, which are included in other assets in the consolidated balance sheets, are classified as available for sale and are reflected at fair value. The fair value of these securities was determined by estimating the future cash flows of the securities and the residential real estate utilizing discount rates of 6% and 18%, respectively. Unrealized gains or losses on these securities, net of tax, are recorded in accumulated other comprehensive income (loss) in the consolidated balance sheets. The Company has entered into an agreement to purchase this residential real estate parcel and all additional defaulted debt securities associated with the parcel, in order to develop the property and build and sell homes. In April 2015, the Company completed this purchase transaction for $19.6 million in cash. The purchase price will be allocated to the land and the debt securities acquired in the third quarter of fiscal 2015.
[2]	Mortgage loans held for sale are reflected at fair value. Interest income earned on mortgage loans held for sale is based on contractual interest rates and included in financial services interest and other income. Mortgage loans held for sale at March 31, 2015 includes $13.4 million of originated loans for which the Company elected the fair value option upon origination and which the Company has not sold into the secondary market, but plans to sell as market conditions permit. The fair value of these mortgage loans held for sale is generally calculated considering the secondary market and adjusted for the value of the underlying collateral, including interest rate risk, liquidity risk and prepayment risk.
[3]	Fair value measurements of these derivatives represent changes in fair value, as calculated by reference to quoted prices for similar assets, and are reflected in the balance sheet. Changes in these fair values during the periods presented are included in financial services revenues in the consolidated statements of operations.

Fair_Value_Measurements_Fair_V

Fair Value Measurements Fair Value Measurements - Level 3 Rollforward (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2015		Jun. 30, 2015	Sep. 30, 2014
Homebuilding [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other Investments	20.8		$20.80			$20.80
Homebuilding [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other Investments	20.8	[1]	20.8	[1]		20.8	[1]
Financial Services [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage loans held for sale	517.6		517.6			476.9
Financial Services [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage loans held for sale	13.4	[2]	13.4	[2]		12	[2]
Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Discount Rate	6.00%
Debt Securities [Member] | Homebuilding [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings, Description			0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases			0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements			0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales			0	[2]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3			0	[2]
Residential Real Estate [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Discount Rate	18.00%
Loans Receivable [Member] | Financial Services [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings, Description			0.4	[2]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases			0	[2]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales			-0.7	[2]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3			1.7	[2]
Scenario, Forecast [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Payments to Acquire Land					$19.60
[1]	In October 2012, the Company purchased defaulted debt securities which are secured by residential real estate. These securities, which are included in other assets in the consolidated balance sheets, are classified as available for sale and are reflected at fair value. The fair value of these securities was determined by estimating the future cash flows of the securities and the residential real estate utilizing discount rates of 6% and 18%, respectively. Unrealized gains or losses on these securities, net of tax, are recorded in accumulated other comprehensive income (loss) in the consolidated balance sheets. The Company has entered into an agreement to purchase this residential real estate parcel and all additional defaulted debt securities associated with the parcel, in order to develop the property and build and sell homes. In April 2015, the Company completed this purchase transaction for $19.6 million in cash. The purchase price will be allocated to the land and the debt securities acquired in the third quarter of fiscal 2015.
[2]	Mortgage loans held for sale are reflected at fair value. Interest income earned on mortgage loans held for sale is based on contractual interest rates and included in financial services interest and other income. Mortgage loans held for sale at March 31, 2015 includes $13.4 million of originated loans for which the Company elected the fair value option upon origination and which the Company has not sold into the secondary market, but plans to sell as market conditions permit. The fair value of these mortgage loans held for sale is generally calculated considering the secondary market and adjusted for the value of the underlying collateral, including interest rate risk, liquidity risk and prepayment risk.

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details 1) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Sep. 30, 2014
Financial Services [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate Acquired Through Foreclosure	0.5		$0.70
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Homebuilding [Member] | Inventories [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	21.6	[1],[2]	19.2	[1],[2]
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Homebuilding [Member] | Assets Held-for-sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	1.4	[1],[3]	8.2	[1],[3]
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Financial Services [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other mortgage loans	14.6	[1],[4]	16	[1],[4]
Real Estate Acquired Through Foreclosure	0.2	[1],[4]	$0.50	[1],[4]
Inventories [Member] | Minimum [Member] | Homebuilding [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	12.00%
Inventories [Member] | Maximum [Member] | Homebuilding [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate	18.00%
[1]	The fair values included in the table above represent only those assets whose carrying values were adjusted to fair value in the respective quarter.
[2]	In performing its impairment analysis of communities, discount rates ranging from 12% to 18% were used in the periods presented.
[3]	The fair value of inventory available for sale was determined based on recent offers received from outside third parties, comparable sales or actual contracts.
[4]	The fair values of other mortgage loans and real estate owned are determined based on the value of the underlying collateral.

Fair_Value_Measurements_Fair_V1

Fair Value Measurements Fair Value Measurement (Details 2) (Details) (USD $)	Mar. 31, 2015		Sep. 30, 2014		Mar. 31, 2014	Sep. 30, 2013
In Millions, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	$697.70		$661.80		$993.40	$977.40
Notes Payable	3,945.50		3,682.80
Homebuilding [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	665.8		632.5
Restricted Cash and Cash Equivalents	10.4		10
Notes Payable	3,548		3,323.60
Homebuilding [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	665.8	[1]	632.5	[1]
Other Assets, Fair Value Disclosure	10.4	[1]	10	[1]
Homebuilding [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	175		300
Homebuilding [Member] | Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	665.8	[1]	632.5	[1]
Other Assets, Fair Value Disclosure	10.4	[1]	10	[1]
Line of Credit Facility, Fair Value of Amount Outstanding	175		300
Financial Services [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	31.9		29.3
Financial Services [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	31.9	[1]	29.3	[1]
Financial Services [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	397.5	[1]	359.2	[1]
Financial Services [Member] | Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	397.5	[1]	359.2	[1]
Cash and Cash Equivalents, Fair Value Disclosure	31.9	[1]	29.3	[1]
Line of Credit [Member] | Homebuilding [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of Credit Facility, Amount Outstanding	175		300
Senior Notes [Member] | Homebuilding [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable	3,342.60		3,000.20
Senior Notes [Member] | Homebuilding [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	3,432.90	[2]	3,033.80	[2]
Senior Notes [Member] | Homebuilding [Member] | Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	3,432.90	[2]	3,033.80	[2]
Secured Debt [Member] | Homebuilding [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable	30.4		23.4
Secured Debt [Member] | Homebuilding [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	30.4	[2]	23.4	[2]
Secured Debt [Member] | Homebuilding [Member] | Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes Payable, Fair Value Disclosure	$30.40	[2]	$23.40	[2]
[1]	The fair value approximates carrying value due to its short-term nature, short maturity or floating interest rate terms, as applicable.
[2]	The fair value is determined based on quoted market prices of recent transactions of the notes, which is classified as Level 2 within the fair value hierarchy.

Subsequent_Event_Details

Subsequent Event (Details) (USD $)	6 Months Ended		3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2015	Apr. 24, 2015
				Lot
				Home
Subsequent Event [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$0	$34.50
Subsequent Event [Member]
Subsequent Event [Line Items]
Business Acquisition, Date of Acquisition Agreement			24-Apr-15
Payments to Acquire Businesses, Net of Cash Acquired			$72
Business Acquisition, Number of Homes Acquired				90
Business Acquisition, Number of Finished Lots				350
Business Acquisition, Number of Lots Under Option Contracts				400
Business Acquisition, Sales Order Backlog Acquired (Homes)				41
Business Acquisition, Sales Order Backlog Acquired (Value)				18,000,000

Supplemental_Guarantor_Informa2

Supplemental Guarantor Information (Details) (USD $)	Mar. 31, 2015		Sep. 30, 2014		Mar. 31, 2014	Sep. 30, 2013
In Millions, unless otherwise specified
ASSETS
Cash and cash equivalents	$697.70		$661.80		$993.40	$977.40
Investments in subsidiaries	0		0
Other assets	514.2		502.7
Advances to Affiliate	0		0
Total assets	10,713.10		10,202.50
LIABILITIES & EQUITY
Accounts payable and other liabilities	1,346.60		1,400
Intercompany payables	0		0
Notes payable	3,945.50		3,682.80
Total liabilities	5,292.10		5,082.80
Total stockholders' equity	5,418.10		5,115.80
Noncontrolling interests	2.9		3.9
Total equity	5,421		5,119.70
Total liabilities and equity	10,713.10		10,202.50
D.R. Horton, Inc. [Member]
ASSETS
Cash and cash equivalents	522.1		497.4		862.8	871.4
Investments in subsidiaries	3,118.50		2,878.20
Other assets	168.6		163
Advances to Affiliate	2,484.80		2,364.20
Total assets	9,304.40		8,827.30
LIABILITIES & EQUITY
Accounts payable and other liabilities	367.1		409.8
Intercompany payables	0		0
Notes payable	3,519.20		3,301.70
Total liabilities	3,886.30		3,711.50
Total stockholders' equity	5,418.10		5,115.80
Noncontrolling interests	0		0
Total equity	5,418.10		5,115.80
Total liabilities and equity	9,304.40		8,827.30
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	96		89.5		63	38.4
Investments in subsidiaries	0		0
Other assets	246.8		250.8
Advances to Affiliate	0		0
Total assets	6,192.60		5,865
LIABILITIES & EQUITY
Accounts payable and other liabilities	842.9		853.3
Intercompany payables	2,373.10		2,282.20
Notes payable	10.6		3.4
Total liabilities	3,226.60		3,138.90
Total stockholders' equity	2,966		2,726.10
Noncontrolling interests	0		0
Total equity	2,966		2,726.10
Total liabilities and equity	6,192.60		5,865
Non-Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	79.6		74.9		67.6	67.6
Investments in subsidiaries	0		0
Other assets	98.8		88.9
Advances to Affiliate	0		0
Total assets	819.4		752.6
LIABILITIES & EQUITY
Accounts payable and other liabilities	136.6		136.9
Intercompany payables	111.7		82
Notes payable	415.7		377.7
Total liabilities	664		596.6
Total stockholders' equity	152.5		152.1
Noncontrolling interests	2.9		3.9
Total equity	155.4		156
Total liabilities and equity	819.4		752.6
Eliminations [Member]
ASSETS
Cash and cash equivalents	0		0		0	0
Investments in subsidiaries	-3,118.50		-2,878.20
Other assets	0		0
Advances to Affiliate	-2,484.80		-2,364.20
Total assets	-5,603.30		-5,242.40
LIABILITIES & EQUITY
Accounts payable and other liabilities	0		0
Intercompany payables	-2,484.80		-2,364.20
Notes payable	0		0
Total liabilities	-2,484.80		-2,364.20
Total stockholders' equity	-3,118.50		-2,878.20
Noncontrolling interests	0		0
Total equity	-3,118.50		-2,878.20
Total liabilities and equity	-5,603.30		-5,242.40
Homebuilding [Member]
ASSETS
Cash and cash equivalents	665.8		632.5
Restricted cash	10.4		10
Inventories	8,136.90	[1]	7,700.50	[1]
Deferred income taxes	547.7		565
Property and equipment, net	193.8		190.8
Other assets	442.4		441.1
Goodwill	94.8		94.8
Total assets	10,091.80		9,634.70
LIABILITIES & EQUITY
Notes payable	3,548		3,323.60
Total liabilities	4,847.60		4,678.90
Homebuilding [Member] | D.R. Horton, Inc. [Member]
ASSETS
Restricted cash	7		6.8
Inventories	2,768.10		2,675.90
Deferred income taxes	178.5		189.9
Property and equipment, net	56.8		51.9
Goodwill	0		0
Homebuilding [Member] | Guarantor Subsidiaries [Member]
ASSETS
Restricted cash	2.3		2.1
Inventories	5,344.20		5,014.30
Deferred income taxes	358.5		364.4
Property and equipment, net	50		49.1
Goodwill	94.8		94.8
Homebuilding [Member] | Non-Guarantor Subsidiaries [Member]
ASSETS
Restricted cash	1.1		1.1
Inventories	24.6		10.3
Deferred income taxes	10.7		10.7
Property and equipment, net	87		89.8
Goodwill	0		0
Homebuilding [Member] | Eliminations [Member]
ASSETS
Restricted cash	0		0
Inventories	0		0
Deferred income taxes	0		0
Property and equipment, net	0		0
Goodwill	0		0
Financial Services [Member]
ASSETS
Cash and cash equivalents	31.9		29.3
Other assets	71.8		61.6
Mortgage loans held for sale	517.6		476.9
Total assets	621.3		567.8
LIABILITIES & EQUITY
Total liabilities	444.5		403.9
Financial Services [Member] | D.R. Horton, Inc. [Member]
ASSETS
Mortgage loans held for sale	0		0
Financial Services [Member] | Guarantor Subsidiaries [Member]
ASSETS
Mortgage loans held for sale	0		0
Financial Services [Member] | Non-Guarantor Subsidiaries [Member]
ASSETS
Mortgage loans held for sale	517.6		476.9
Financial Services [Member] | Eliminations [Member]
ASSETS
Mortgage loans held for sale	$0		$0
[1]	Homebuilding inventories are the only assets included in the measure of homebuilding segment assets used by the Company’s chief operating decision makers.

Supplemental_Guarantor_Informa3

Supplemental Guarantor Information (Details 1) (USD $)	3 Months Ended				6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014		Mar. 31, 2015		Mar. 31, 2014
Financial Services [Abstract]
Income (loss) before income taxes	$230.10	[1]	$201.90	[1]	$450.80	[1]	$391.60	[1]
Income tax expense (benefit)	82.2		70.9		160.4		137.5
Net income	147.9		131		290.4		254.1
Comprehensive income	147.9		131.3		290.4		254.4
Homebuilding [Member]
Homebuilding:
Revenues	2,338.50		1,696.60		4,591.50		3,332.30
Cost of sales	1,892		1,319.80		3,706.50		2,593.50
Gross profit	446.5		376.8		885		738.8
Selling, general and administrative expense	242.4		187.9		480.4		371.3
Equity in (income) of subsidiaries	0		0		0		0
Other (income)	-4.5		-2.8		-10.1		-6.1
Financial Services [Abstract]
Income (loss) before income taxes	208.6	[1]	191.7	[1]	414.7	[1]	373.6	[1]
Financial Services [Member]
Financial Services [Abstract]
Financial Services Revenue	59.5		38.4		109.2		73.3
General and administrative expense	40.7		30.2		78.6		60
Interest and other (income)	-2.7		-2		-5.5		-4.7
Income (loss) before income taxes	21.5	[1]	10.2	[1]	36.1	[1]	18	[1]
D.R. Horton, Inc. [Member]
Financial Services [Abstract]
Income (loss) before income taxes	230.1		201.9		450.8		391.6
Income tax expense (benefit)	82.2		70.9		160.4		137.5
Net income	147.9		131		290.4		254.1
Comprehensive income	147.9		131		290.4		254.1
D.R. Horton, Inc. [Member] | Homebuilding [Member]
Homebuilding:
Revenues	727		574.1		1,423.80		1,126.20
Cost of sales	593.7		453.5		1,147.70		883
Gross profit	133.3		120.6		276.1		243.2
Selling, general and administrative expense	112.4		87.9		222.6		176.9
Equity in (income) of subsidiaries	-208.5		-169		-396.3		-324.6
Other (income)	-0.7		-0.2		-1		-0.7
Financial Services [Abstract]
Income (loss) before income taxes	230.1		201.9		450.8		391.6
D.R. Horton, Inc. [Member] | Financial Services [Member]
Financial Services [Abstract]
Financial Services Revenue	0		0		0		0
General and administrative expense	0		0		0		0
Interest and other (income)	0		0		0		0
Income (loss) before income taxes	0		0		0		0
Guarantor Subsidiaries [Member]
Financial Services [Abstract]
Income (loss) before income taxes	190.4		159.1		369.7		307.3
Income tax expense (benefit)	67.7		55.9		130.9		107.9
Net income	122.7		103.2		238.8		199.4
Comprehensive income	122.7		103.5		238.8		199.7
Guarantor Subsidiaries [Member] | Homebuilding [Member]
Homebuilding:
Revenues	1,611.50		1,119.70		3,167.70		2,200
Cost of sales	1,297.80		864		2,554.90		1,704.50
Gross profit	313.7		255.7		612.8		495.5
Selling, general and administrative expense	124.4		97.7		245.6		190.2
Equity in (income) of subsidiaries	0		0		0		0
Other (income)	-1.1		-1.1		-2.5		-2
Financial Services [Abstract]
Income (loss) before income taxes	190.4		159.1		369.7		307.3
Guarantor Subsidiaries [Member] | Financial Services [Member]
Financial Services [Abstract]
Financial Services Revenue	0		0		0		0
General and administrative expense	0		0		0		0
Interest and other (income)	0		0		0		0
Income (loss) before income taxes	0		0		0		0
Non-Guarantor Subsidiaries [Member]
Financial Services [Abstract]
Income (loss) before income taxes	18.1		9.9		26.6		17.3
Income tax expense (benefit)	6.9		3.4		10.3		6
Net income	11.2		6.5		16.3		11.3
Comprehensive income	11.2		6.5		16.3		11.3
Non-Guarantor Subsidiaries [Member] | Homebuilding [Member]
Homebuilding:
Revenues	0		2.8		0		6.1
Cost of sales	0.5		2.3		3.9		6
Gross profit	-0.5		0.5		-3.9		0.1
Selling, general and administrative expense	5.6		2.3		12.2		4.2
Equity in (income) of subsidiaries	0		0		0		0
Other (income)	-2.7		-1.5		-6.6		-3.4
Financial Services [Abstract]
Income (loss) before income taxes	-3.4		-0.3		-9.5		-0.7
Non-Guarantor Subsidiaries [Member] | Financial Services [Member]
Financial Services [Abstract]
Financial Services Revenue	59.5		38.4		109.2		73.3
General and administrative expense	40.7		30.2		78.6		60
Interest and other (income)	-2.7		-2		-5.5		-4.7
Income (loss) before income taxes	21.5		10.2		36.1		18
Eliminations [Member]
Financial Services [Abstract]
Income (loss) before income taxes	-208.5		-169		-396.3		-324.6
Income tax expense (benefit)	-74.6		-59.3		-141.2		-113.9
Net income	-133.9		-109.7		-255.1		-210.7
Comprehensive income	-133.9		-109.7		-255.1		-210.7
Eliminations [Member] | Homebuilding [Member]
Homebuilding:
Revenues	0		0		0		0
Cost of sales	0		0		0		0
Gross profit	0		0		0		0
Selling, general and administrative expense	0		0		0		0
Equity in (income) of subsidiaries	208.5		169		396.3		324.6
Other (income)	0		0		0		0
Financial Services [Abstract]
Income (loss) before income taxes	-208.5		-169		-396.3		-324.6
Eliminations [Member] | Financial Services [Member]
Financial Services [Abstract]
Financial Services Revenue	0		0		0		0
General and administrative expense	0		0		0		0
Interest and other (income)	0		0		0		0
Income (loss) before income taxes	$0		$0		$0		$0
[1]	Expenses maintained at the corporate level consist primarily of interest and property taxes, which are capitalized and amortized to cost of sales or expensed directly, and the expenses related to operating the Company’s corporate office. The amortization of capitalized interest and property taxes is allocated to each segment based on the segment’s cost of sales, while those expenses associated with the corporate office are allocated to each segment based on the segment’s inventory balances.

Supplemental_Guarantor_Informa4

Supplemental Guarantor Information (Details 2) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
OPERATING ACTIVITIES
Net cash used in operating activities	($168.80)	($265.80)
INVESTING ACTIVITIES
Purchases of property and equipment	-24	-32.8
Decrease (increase) in restricted cash	-0.4	-2
Net principal increase of mortgage loans held in portfolio and real estate owned	-4.9	-1.7
Payments for (Proceeds from) Other Investing Activities	0	0
Payment related to acquisition of a business	0	-34.5
Net cash used in investing activities	-29.3	-71
FINANCING ACTIVITIES
Proceeds from Notes Payable	1,350.30	497
Repayments of Notes Payable	-1,098.30	-163.6
Proceeds from (Payments for) Other Financing Activities	0	0
Proceeds from stock associated with certain employee benefit plans	21	29.6
Income tax benefit from employee stock awards	6.7	1.9
Cash dividends paid	-45.7	-12.1
Net cash provided by financing activities	234	352.8
(Decrease) increase in cash and cash equivalents	35.9	16
Cash and cash equivalents at beginning of period	661.8	977.4
Cash and cash equivalents at end of period	697.7	993.4
D.R. Horton, Inc. [Member]
OPERATING ACTIVITIES
Net cash used in operating activities	-35.5	-169.9
INVESTING ACTIVITIES
Purchases of property and equipment	-15	-12.3
Decrease (increase) in restricted cash	-0.2	-2.1
Net principal increase of mortgage loans held in portfolio and real estate owned	0	0
Payments for (Proceeds from) Other Investing Activities	-120.9	-157.4
Payment related to acquisition of a business		-34.5
Net cash used in investing activities	-136.1	-206.3
FINANCING ACTIVITIES
Proceeds from Notes Payable	1,312	497
Repayments of Notes Payable	-1,097.70	-148.8
Proceeds from (Payments for) Other Financing Activities	0	0
Proceeds from stock associated with certain employee benefit plans	21	29.6
Income tax benefit from employee stock awards	6.7	1.9
Cash dividends paid	-45.7	-12.1
Net cash provided by financing activities	196.3	367.6
(Decrease) increase in cash and cash equivalents	24.7	-8.6
Cash and cash equivalents at beginning of period	497.4	871.4
Cash and cash equivalents at end of period	522.1	862.8
Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES
Net cash used in operating activities	-74	-118.9
INVESTING ACTIVITIES
Purchases of property and equipment	-11	-15.1
Decrease (increase) in restricted cash	-0.2	0
Net principal increase of mortgage loans held in portfolio and real estate owned	0	0
Payments for (Proceeds from) Other Investing Activities	0	0
Payment related to acquisition of a business		0
Net cash used in investing activities	-11.2	-15.1
FINANCING ACTIVITIES
Proceeds from Notes Payable	0	0
Repayments of Notes Payable	-0.3	0
Proceeds from (Payments for) Other Financing Activities	92	158.6
Proceeds from stock associated with certain employee benefit plans	0	0
Income tax benefit from employee stock awards	0	0
Cash dividends paid	0	0
Net cash provided by financing activities	91.7	158.6
(Decrease) increase in cash and cash equivalents	6.5	24.6
Cash and cash equivalents at beginning of period	89.5	38.4
Cash and cash equivalents at end of period	96	63
Non-Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES
Net cash used in operating activities	-44.3	63
INVESTING ACTIVITIES
Purchases of property and equipment		-5.4
Proceeds from Sale of Property, Plant, and Equipment	2
Decrease (increase) in restricted cash	0	0.1
Net principal increase of mortgage loans held in portfolio and real estate owned	-4.9	-1.7
Payments for (Proceeds from) Other Investing Activities	0	0
Payment related to acquisition of a business		0
Net cash used in investing activities	-2.9	-7
FINANCING ACTIVITIES
Proceeds from Notes Payable	38.3	0
Repayments of Notes Payable	-0.3	-14.8
Proceeds from (Payments for) Other Financing Activities	28.9	-1.2
Proceeds from stock associated with certain employee benefit plans	0	0
Income tax benefit from employee stock awards	0	0
Cash dividends paid	-15	-40
Net cash provided by financing activities	51.9	-56
(Decrease) increase in cash and cash equivalents	4.7	0
Cash and cash equivalents at beginning of period	74.9	67.6
Cash and cash equivalents at end of period	79.6	67.6
Eliminations [Member]
OPERATING ACTIVITIES
Net cash used in operating activities	-15	-40
INVESTING ACTIVITIES
Purchases of property and equipment	0	0
Decrease (increase) in restricted cash	0	0
Net principal increase of mortgage loans held in portfolio and real estate owned	0	0
Payments for (Proceeds from) Other Investing Activities	120.9	157.4
Payment related to acquisition of a business		0
Net cash used in investing activities	120.9	157.4
FINANCING ACTIVITIES
Proceeds from Notes Payable	0	0
Repayments of Notes Payable	0	0
Proceeds from (Payments for) Other Financing Activities	-120.9	-157.4
Proceeds from stock associated with certain employee benefit plans	0	0
Income tax benefit from employee stock awards	0	0
Cash dividends paid	15	40
Net cash provided by financing activities	-105.9	-117.4
(Decrease) increase in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$0	$0