Supplemental Guarantor Information (Details 2) (USD $) In Millions	3 Months Ended	9 Months Ended
Jun. 30, 2011	Jun. 30, 2011	Jun. 30, 2010
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities		$ (75.3)	$ 587.1
INVESTING ACTIVITIES
Purchases of property and equipment		(12.8)	(15.6)
Purchases of marketable securities		(259.7)	(299.4)
Proceeds from the sale or maturity of marketable securities		254.7
Decrease (increase) in restricted cash		3.3	(3.6)
Net cash used in investing activities		(14.5)	(318.6)
FINANCING ACTIVITIES
Net change in notes payable		(306.7)	(805.0)
Proceeds from stock associated with certain employee benefit plans		2.7	4.6
Income tax benefit from stock option exercises		0	2.9
Cash dividends paid		(35.9)	(35.8)
Purchase of treasury stock	(38.6)	(38.6)	0
Net cash used in financing activities		(378.5)	(833.3)
DECREASE IN CASH AND CASH EQUIVALENTS		(468.3)	(564.8)
Cash and cash equivalents at beginning of period		1,309.3	1,957.3
Cash and cash equivalents at end of period	841.0	841.0	1,392.5
D.R Horton, Inc. [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities		(104.1)	344.4
INVESTING ACTIVITIES
Purchases of property and equipment		(6.0)	(6.7)
Purchases of marketable securities		(259.7)	(299.4)
Proceeds from the sale or maturity of marketable securities		254.7
Decrease (increase) in restricted cash		3.7	(3.6)
Net cash used in investing activities		(7.3)	(309.7)
FINANCING ACTIVITIES
Net change in notes payable		336.5	(888.7)
Net change in intercompany receivables/payables		78.4	314.0
Proceeds from stock associated with certain employee benefit plans		2.7	4.6
Income tax benefit from stock option exercises		0	2.9
Cash dividends paid		(35.9)	(35.8)
Purchase of treasury stock		(38.6)	0
Net cash used in financing activities		(329.9)	(603.0)
DECREASE IN CASH AND CASH EQUIVALENTS		(441.3)	(568.3)
Cash and cash equivalents at beginning of period		1,234.9	1,871.2
Cash and cash equivalents at end of period	793.6	793.6	1,302.9
Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities		67.6	323.9
INVESTING ACTIVITIES
Purchases of property and equipment		(6.8)	(8.5)
Decrease (increase) in restricted cash		(0.2)
Net cash used in investing activities		(7.0)	(8.5)
FINANCING ACTIVITIES
Net change in intercompany receivables/payables		(78.3)	(311.6)
Net cash used in financing activities		(78.3)	(311.6)
DECREASE IN CASH AND CASH EQUIVALENTS		(17.7)	3.8
Cash and cash equivalents at beginning of period		45.3	48.3
Cash and cash equivalents at end of period	27.6	27.6	52.1
Non-Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities		(38.8)	(81.2)
INVESTING ACTIVITIES
Purchases of property and equipment		0	(0.4)
Decrease (increase) in restricted cash		(0.2)
Net cash used in investing activities		(0.2)	(0.4)
FINANCING ACTIVITIES
Net change in notes payable		29.8	83.7
Net change in intercompany receivables/payables		(0.1)	(2.4)
Net cash used in financing activities		29.7	81.3
DECREASE IN CASH AND CASH EQUIVALENTS		(9.3)	(0.3)
Cash and cash equivalents at beginning of period		29.1	37.8
Cash and cash equivalents at end of period	19.8	19.8	37.5
Eliminations [Member]
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities		0	0
INVESTING ACTIVITIES
Purchases of property and equipment		0	0
Purchases of marketable securities		0	0
Proceeds from the sale or maturity of marketable securities		0
Decrease (increase) in restricted cash		0	0
Net cash used in investing activities		0	0
FINANCING ACTIVITIES
Net change in notes payable		0	0
Net change in intercompany receivables/payables		0	0
Proceeds from stock associated with certain employee benefit plans		0	0
Income tax benefit from stock option exercises		0	0
Cash dividends paid		0	0
Purchase of treasury stock		0	0
Net cash used in financing activities		0	0
DECREASE 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	$ 0

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified share-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element represents the cash inflow reported in the enterprise's financing activities.

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-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
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-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 16
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 18
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (a),(b)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585

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