Supplemental Guarantor Information (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Sep. 30, 2013		Dec. 31, 2012	Sep. 30, 2012
ASSETS
Cash and cash equivalents	$ 820.1		$ 936.5		$ 566.9	$ 1,047.7
Other assets	492.9		517.4
Total assets	8,927.2		8,856.4
LIABILITIES & EQUITY
Accounts payable and other liabilities	1,265.4		1,286.0
Notes payable	3,461.9		3,509.0
Total liabilities	4,727.3		4,795.0
Total stockholders' equity	4,196.8		4,058.5
Noncontrolling interests	3.1		2.9
Total equity	4,199.9		4,061.4
Total liabilities and equity	8,927.2		8,856.4
D.R. Horton, Inc. [Member]
ASSETS
Cash and cash equivalents	777.1		871.4		526.6	968.9
Investments in subsidiaries	2,538.7		2,477.7
Other assets	152.0		167.0
Advances to Affiliate	1,726.9		1,697.0
Total assets	7,868.1		7,709.7
LIABILITIES & EQUITY
Accounts payable and other liabilities	398.9		383.8
Notes payable	3,272.4		3,267.4
Total liabilities	3,671.3		3,651.2
Total stockholders' equity	4,196.8		4,058.5
Total equity	4,196.8		4,058.5
Total liabilities and equity	7,868.1		7,709.7
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	19.8		38.4		18.9	56.3
Other assets	230.2		233.4
Total assets	4,841.4		4,734.2
LIABILITIES & EQUITY
Accounts payable and other liabilities	744.2		766.5
Intercompany payables	1,696.7		1,664.2
Notes payable	3.7		3.0
Total liabilities	2,444.6		2,433.7
Total stockholders' equity	2,396.8		2,300.5
Total equity	2,396.8		2,300.5
Total liabilities and equity	4,841.4		4,734.2
Non-Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	23.2		26.7		21.4	22.5
Other assets	110.7		117.0
Total assets	483.3		587.2
LIABILITIES & EQUITY
Accounts payable and other liabilities	122.3		135.7
Intercompany payables	30.2		32.8
Notes payable	185.8		238.6
Total liabilities	338.3		407.1
Total stockholders' equity	141.9		177.2
Noncontrolling interests	3.1		2.9
Total equity	145.0		180.1
Total liabilities and equity	483.3		587.2
Eliminations [Member]
ASSETS
Investments in subsidiaries	(2,538.7)		(2,477.7)
Advances to Affiliate	(1,726.9)		(1,697.0)
Total assets	(4,265.6)		(4,174.7)
LIABILITIES & EQUITY
Intercompany payables	(1,726.9)		(1,697.0)
Total liabilities	(1,726.9)		(1,697.0)
Total stockholders' equity	(2,538.7)		(2,477.7)
Total equity	(2,538.7)		(2,477.7)
Total liabilities and equity	(4,265.6)		(4,174.7)
Homebuilding [Member]
ASSETS
Cash and cash equivalents	801.1		913.3
Restricted cash	81.1		77.8
Inventories	6,496.1	[1]	6,197.4	[1]
Deferred income taxes	578.5		586.6
Property and equipment, net	117.5		106.7
Other assets	441.1		460.5
Goodwill	41.2		38.9
Total assets	8,556.6		8,381.2
LIABILITIES & EQUITY
Notes payable	3,276.1		3,270.4
Total liabilities	4,502.5		4,502.8
Homebuilding [Member] | D.R. Horton, Inc. [Member]
ASSETS
Restricted cash	80.2		76.5
Inventories	2,344.1		2,177.4
Deferred income taxes	205.0		201.7
Property and equipment, net	44.1		41.0
Homebuilding [Member] | Guarantor Subsidiaries [Member]
ASSETS
Restricted cash	0.9		1.2
Inventories	4,135.8		4,002.9
Deferred income taxes	373.5		384.9
Property and equipment, net	40.0		34.5
Goodwill	41.2		38.9
Homebuilding [Member] | Non-Guarantor Subsidiaries [Member]
ASSETS
Restricted cash	0		0.1
Inventories	16.2		17.1
Property and equipment, net	33.4		31.2
Financial Services [Member]
ASSETS
Cash and cash equivalents	19.0		23.2
Other assets	51.8		56.9
Mortgage loans held for sale	299.8		395.1
Total assets	370.6		475.2
LIABILITIES & EQUITY
Total liabilities	224.8		292.2
Financial Services [Member] | Non-Guarantor Subsidiaries [Member]
ASSETS
Mortgage loans held for sale	$ 299.8		$ 395.1

[1] Homebuilding inventories are the only assets included in the measure of homebuilding segment assets used by the Company’s chief operating decision maker.