Supplemental Guarantor Information (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended				15 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012
Homebuilding:
(Gain) loss on early retirement of debt, net					$ (0.1)		$ 10.7
Financial Services [Abstract]
Income (loss) before income taxes	72.2	[1]	28.9	[1]	143.7	[1]	(21.8)	[1]	206.4
Income tax expense (benefit)	(715.6)		0.2		(712.5)		(57.8)
Net income	787.8		28.7		856.2		36.0
Comprehensive income	787.7		28.7		856.1		36.0
Homebuilding [Member]
Homebuilding:
Revenues	1,116.2		975.4		2,937.4		2,475.5
Cost of sales	917.9		824.1		2,426.0		2,109.2
Gross profit	198.3		151.3		511.4		366.3
Selling, general and administrative expense	136.4		113.7		382.9		355.8
Interest expense	6.2		10.1		18.7		41.0
(Gain) loss on early retirement of debt, net	0		6.5		(0.1)		10.7
Other (income)	(2.6)		(1.2)		(8.1)		(6.8)
Financial Services [Abstract]
Interest expense	6.2		10.1		18.7		41.0
Income (loss) before income taxes	58.3	[1]	22.2	[1]	118.0	[1]	(34.4)	[1]
Financial Services [Member]
Homebuilding:
Interest expense	0.6		0.3		2.4		0.7
Financial Services [Abstract]
Revenues, net of recourse and reinsurance expense	33.8		23.8		80.4		63.0
General and administrative expense	21.5		19.3		59.9		56.4
Interest expense	0.6		0.3		2.4		0.7
Interest and other (income)	(2.2)		(2.5)		(7.6)		(6.7)
Income (loss) before income taxes	13.9	[1]	6.7	[1]	25.7	[1]	12.6	[1]
D.R. Horton, Inc. [Member]
Financial Services [Abstract]
Income (loss) before income taxes	72.2		28.9		143.7		(21.8)
Income tax expense (benefit)	(715.6)		0.2		(712.5)		(57.8)
Net income	787.8		28.7		856.2		36.0
Comprehensive income	787.7		28.7		856.1		36.0
D.R. Horton, Inc. [Member] | Homebuilding [Member]
Homebuilding:
Revenues	363.8		283.5		973.9		693.2
Cost of sales	293.3		235.6		791.2		561.0
Gross profit	70.5		47.9		182.7		132.2
Selling, general and administrative expense	63.5		50.5		178.0		159.7
Equity in (income) of subsidiaries	(70.7)		(47.7)		(155.0)		(54.9)
Interest expense	6.2		10.1		18.7		41.0
(Gain) loss on early retirement of debt, net			6.5		(0.1)		10.7
Other (income)	(0.7)		(0.4)		(2.6)		(2.5)
Financial Services [Abstract]
Interest expense	6.2		10.1		18.7		41.0
Income (loss) before income taxes	72.2		28.9		143.7		(21.8)
Guarantor Subsidiaries [Member]
Financial Services [Abstract]
Income (loss) before income taxes	60.2		42.0		138.0		42.9
Income tax expense (benefit)	(464.0)		0.5		(462.0)		(40.5)
Net income	524.2		41.5		600.0		83.4
Comprehensive income	524.2		41.5		600.0		83.4
Guarantor Subsidiaries [Member] | Homebuilding [Member]
Homebuilding:
Revenues	750.6		687.4		1,957.3		1,773.3
Cost of sales	620.4		583.7		1,623.0		1,534.2
Gross profit	130.2		103.7		334.3		239.1
Selling, general and administrative expense	71.2		61.5		199.7		197.4
Other (income)	(1.2)		0.2		(3.4)		(1.2)
Financial Services [Abstract]
Income (loss) before income taxes	60.2		42.0		138.0		42.9
Non-Guarantor Subsidiaries [Member]
Financial Services [Abstract]
Income (loss) before income taxes	10.5		5.7		17.0		12.0
Income tax expense (benefit)	(20.7)		0.1		(20.5)		(1.5)
Net income	31.2		5.6		37.5		13.5
Comprehensive income	31.2		5.6		37.5		13.5
Non-Guarantor Subsidiaries [Member] | Homebuilding [Member]
Homebuilding:
Revenues	1.8		4.5		6.2		9.0
Cost of sales	4.2		4.8		11.8		14.0
Gross profit	(2.4)		(0.3)		(5.6)		(5.0)
Selling, general and administrative expense	1.7		1.7		5.2		(1.3)
Other (income)	(0.7)		(1.0)		(2.1)		(3.1)
Financial Services [Abstract]
Income (loss) before income taxes	(3.4)		(1.0)		(8.7)		(0.6)
Non-Guarantor Subsidiaries [Member] | Financial Services [Member]
Homebuilding:
Interest expense	0.6		0.3		2.4		0.7
Financial Services [Abstract]
Revenues, net of recourse and reinsurance expense	33.8		23.8		80.4		63.0
General and administrative expense	21.5		19.3		59.9		56.4
Interest expense	0.6		0.3		2.4		0.7
Interest and other (income)	(2.2)		(2.5)		(7.6)		(6.7)
Income (loss) before income taxes	13.9		6.7		25.7		12.6
Eliminations [Member]
Financial Services [Abstract]
Income (loss) before income taxes	(70.7)		(47.7)		(155.0)		(54.9)
Income tax expense (benefit)	484.7		(0.6)		482.5		42.0
Net income	(555.4)		(47.1)		(637.5)		(96.9)
Comprehensive income	(555.4)		(47.1)		(637.5)		(96.9)
Eliminations [Member] | Homebuilding [Member]
Homebuilding:
Equity in (income) of subsidiaries	70.7		47.7		155.0		54.9
Financial Services [Abstract]
Income (loss) before income taxes	$ (70.7)		$ (47.7)		$ (155.0)		$ (54.9)

[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 revenue, while interest expense and those expenses associated with the corporate office are allocated to each segment based on the segment’s inventory balances.