Supplemental Guarantor Information (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Homebuilding:
Interest expense	$ 0		$ (4.2)
Financial Services [Abstract]
Interest expense	0		(4.2)
Income (loss) before income taxes	189.7	[1]	107.9	[1]
Income tax expense (benefit)	66.5		41.6
Net income	123.2		66.3
Comprehensive income	123.2		66.2
Homebuilding [Member]
Homebuilding:
Revenues	1,635.6		1,233.2
Cost of sales	1,273.6		1,002.3
Gross profit	362.0		230.9
Selling, general and administrative expense	183.4		140.8
Interest expense	0		3.2
Other (income)	(3.3)		(3.3)
Financial Services [Abstract]
Interest expense	0		3.2
Income (loss) before income taxes	181.9	[1]	90.2	[1]
Financial Services [Member]
Financial Services [Abstract]
Financial Services Revenue	35.0		41.9
General and administrative expense	29.8		25.7
Interest and other (income)	(2.6)		(1.5)
Income (loss) before income taxes	7.8	[1]	17.7	[1]
D.R. Horton, Inc. [Member]
Financial Services [Abstract]
Income tax expense (benefit)	66.5		41.6
Net income	123.2		66.3
Comprehensive income	123.2		66.2
D.R. Horton, Inc. [Member] | Homebuilding [Member]
Homebuilding:
Revenues	552.1		406.2
Cost of sales	429.6		327.0
Gross profit	122.5		79.2
Selling, general and administrative expense	88.9		64.0
Equity in (income) of subsidiaries	(155.6)		(94.9)
Interest expense			3.2
Other (income)	(0.5)		(1.0)
Financial Services [Abstract]
Interest expense			3.2
Guarantor Subsidiaries [Member]
Financial Services [Abstract]
Income tax expense (benefit)	52.0		26.8
Net income	96.2		57.1
Comprehensive income	96.2		57.1
Guarantor Subsidiaries [Member] | Homebuilding [Member]
Homebuilding:
Revenues	1,080.2		823.6
Cost of sales	840.3		665.7
Gross profit	239.9		157.9
Selling, general and administrative expense	92.6		75.1
Other (income)	(0.9)		(1.1)
Non-Guarantor Subsidiaries [Member]
Financial Services [Abstract]
Income tax expense (benefit)	2.6		1.5
Net income	4.8		9.5
Comprehensive income	4.8		9.5
Non-Guarantor Subsidiaries [Member] | Homebuilding [Member]
Homebuilding:
Revenues	3.3		3.4
Cost of sales	3.7		9.6
Gross profit	(0.4)		(6.2)
Selling, general and administrative expense	1.9		1.7
Other (income)	(1.9)		(1.2)
Non-Guarantor Subsidiaries [Member] | Financial Services [Member]
Financial Services [Abstract]
Financial Services Revenue	35.0		41.9
General and administrative expense	29.8		25.7
Interest and other (income)	(2.6)		(1.5)
Income (loss) before income taxes	7.8		17.7
Eliminations [Member]
Financial Services [Abstract]
Income tax expense (benefit)	(54.6)		(28.3)
Net income	(101.0)		(66.6)
Comprehensive income	(101.0)		(66.6)
Eliminations [Member] | Homebuilding [Member]
Homebuilding:
Equity in (income) of subsidiaries	$ 155.6		$ 94.9

[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 those expenses associated with the corporate office are allocated to each segment based on the segment’s inventory balances.