Supplemental Guarantor Information (Details 1) (USD $) In Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Homebuilding:
Interest expense	$ 10.1	$ 19.6	$ 41.0	$ 69.3
Loss on early retirement of debt, net	6.5		10.7	6.7
Income (loss) before income taxes	28.9	46.3	(21.8)	101.2
Financial Services:
Interest expense	10.1	19.6	41.0	69.3
Provision for (benefit from) income taxes	0.2	(4.2)	(57.8)	(152.7)
Net income (loss)	28.7	50.5	36.0	253.9
Homebuilding [Member] | D.R Horton, Inc. [Member]
Homebuilding:
Homebuilding revenues	283.5	370.4	693.2	860.8
Total cost of sales	235.6	295.4	561.0	688.6
Gross profit	47.9	75.0	132.2	172.2
Selling, general and administrative expense	50.5	57.8	159.7	163.1
Equity in (income) of subsidiaries	(47.7)	(56.4)	(54.9)	(165.1)
Interest expense	10.1	19.6	41.0	69.3
Loss on early retirement of debt, net	6.5	8.3	10.7	6.7
Other (income)	(0.4)	(0.6)	(2.5)	(3.0)
Income (loss) before income taxes	28.9	46.3	(21.8)	101.2
Financial Services:
Interest expense	10.1	19.6	41.0	69.3
D.R Horton, Inc. [Member]
Homebuilding:
Income (loss) before income taxes	28.9	46.3	(21.8)	101.2
Financial Services:
Provision for (benefit from) income taxes	0.2	(4.2)	(57.8)	(152.7)
Net income (loss)	28.7	50.5	36.0	253.9
Homebuilding [Member] | Guarantor Subsidiaries [Member]
Homebuilding:
Homebuilding revenues	687.4	1,005.7	1,773.3	2,517.7
Total cost of sales	583.7	875.0	1,534.2	2,138.8
Gross profit	103.7	130.7	239.1	378.9
Selling, general and administrative expense	61.5	84.2	197.4	232.0
Other (income)	0.2	(0.6)	(1.2)	(1.7)
Income (loss) before income taxes	42.0	47.1	42.9	148.6
Guarantor Subsidiaries [Member]
Homebuilding:
Income (loss) before income taxes	42.0	47.1	42.9	148.6
Financial Services:
Provision for (benefit from) income taxes	0.5	(3.2)	(40.5)	(115.1)
Net income (loss)	41.5	50.3	83.4	263.7
Homebuilding [Member] | Non-Guarantor Subsidiaries [Member]
Homebuilding:
Homebuilding revenues	4.5	2.2	9.0	5.5
Total cost of sales	4.8	1.1	14.0	2.2
Gross profit	(0.3)	1.1	(5.0)	3.3
Selling, general and administrative expense	1.7	1.5	(1.3)	6.1
Other (income)	(1.0)	(0.8)	(3.1)	(2.7)
Income (loss) before income taxes	(1.0)	0.4	(0.6)	(0.1)
Financial Services [Member] | Non-Guarantor Subsidiaries [Member]
Homebuilding:
Interest expense	0.3	0.7	0.7	1.4
Income (loss) before income taxes	6.7	8.9	12.6	16.6
Financial Services:
Revenues, net of recourse and reinsurance expense	23.8	27.8	63.0	67.7
General and administrative expense	19.3	21.2	56.4	57.2
Interest expense	0.3	0.7	0.7	1.4
Interest and other (income)	(2.5)	(3.0)	(6.7)	(7.5)
Non-Guarantor Subsidiaries [Member]
Homebuilding:
Income (loss) before income taxes	5.7	9.3	12.0	16.5
Financial Services:
Provision for (benefit from) income taxes	0.1	(0.1)	(1.5)	(3.1)
Net income (loss)	5.6	9.4	13.5	19.6
Homebuilding [Member] | Eliminations [Member]
Homebuilding:
Equity in (income) of subsidiaries	47.7	56.4	54.9	165.1
Income (loss) before income taxes	(47.7)	(56.4)	(54.9)	(165.1)
Eliminations [Member]
Homebuilding:
Income (loss) before income taxes	(47.7)	(56.4)	(54.9)	(165.1)
Financial Services:
Provision for (benefit from) income taxes	(0.6)	3.3	42.0	118.2
Net income (loss)	(47.1)	(59.7)	(96.9)	(283.3)
Homebuilding [Member]
Homebuilding:
Homebuilding revenues	975.4	1,378.3	2,475.5	3,384.0
Total cost of sales	824.1	1,171.5	2,109.2	2,829.6
Gross profit	151.3	206.8	366.3	554.4
Selling, general and administrative expense	113.7	143.5	355.8	401.2
Interest expense	10.1	19.6	41.0	69.3
Loss on early retirement of debt, net	6.5	8.3	10.7	6.7
Other (income)	(1.2)	(2.0)	(6.8)	(7.4)
Income (loss) before income taxes	22.2	37.4	(34.4)	84.6
Financial Services:
Interest expense	10.1	19.6	41.0	69.3
Financial Services [Member]
Homebuilding:
Interest expense	0.3	0.7	0.7	1.4
Income (loss) before income taxes	6.7	8.9	12.6	16.6
Financial Services:
Revenues, net of recourse and reinsurance expense	23.8	27.8	63.0	67.7
General and administrative expense	19.3	21.2	56.4	57.2
Interest expense	0.3	0.7	0.7	1.4
Interest and other (income)	$ (2.5)	$ (3.0)	$ (6.7)	$ (7.5)