Supplemental Guarantor Information (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
OPERATING ACTIVITIES
Net cash used in operating activities		$ (266.9)	$ (840.3)
INVESTING ACTIVITIES
Purchases of property and equipment		(32.8)	(25.3)
Purchases of marketable securities		0	(28.9)
Proceeds from the sale or maturity of marketable securities		0	325.4
Decrease (increase) in restricted cash		(2.0)	(5.2)
Net principal increase of mortgage loans held in portfolio and real estate owned		(1.7)	0
Payments to Acquire Other Investments		0	(18.6)
Payments for (Proceeds from) Other Investing Activities		0	0
Payment related to acquisition of a business		(34.5)	(9.4)
Net cash (used in) provided by investing activities		(71.0)	238.0
FINANCING ACTIVITIES
Proceeds from Notes Payable		497.0	918.0
Repayments of Notes Payable		(163.6)	(170.4)
Proceeds from (Payments for) Other Financing Activities		0	0
Proceeds from stock associated with certain employee benefit plans		29.6	17.7
Income tax benefit from employee stock awards		1.9	0
Cash dividends paid		(12.1)	(60.2)
Net cash provided by (used in) financing activities		352.8	705.1
(Decrease) increase in cash and cash equivalents		14.9	102.8
Cash and cash equivalents at beginning of period	936.5	936.5	1,047.7
Cash and cash equivalents at end of period		951.4	1,150.5
D.R. Horton, Inc. [Member]
OPERATING ACTIVITIES
Net cash used in operating activities	32.0	(169.9)	(310.0)
INVESTING ACTIVITIES
Purchases of property and equipment		(12.3)	(12.9)
Purchases of marketable securities			(28.9)
Proceeds from the sale or maturity of marketable securities			325.4
Decrease (increase) in restricted cash		(2.1)	(4.7)
Net principal increase of mortgage loans held in portfolio and real estate owned		0
Payments to Acquire Other Investments			(18.6)
Payments for (Proceeds from) Other Investing Activities	(32.0)	(157.4)	(495.3)
Payment related to acquisition of a business		(34.5)	(9.4)
Net cash (used in) provided by investing activities		(206.3)	(244.4)
FINANCING ACTIVITIES
Proceeds from Notes Payable		497.0	860.0
Repayments of Notes Payable		(148.8)	(170.4)
Proceeds from (Payments for) Other Financing Activities		0	0
Proceeds from stock associated with certain employee benefit plans		29.6	17.7
Income tax benefit from employee stock awards		1.9
Cash dividends paid		(12.1)	(60.2)
Net cash provided by (used in) financing activities		367.6	647.1
(Decrease) increase in cash and cash equivalents		(8.6)	92.7
Cash and cash equivalents at beginning of period	871.4	871.4	968.9
Cash and cash equivalents at end of period		862.8	1,061.6
Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES
Net cash used in operating activities	(32.0)	(118.9)	(484.2)
INVESTING ACTIVITIES
Purchases of property and equipment		(15.1)	(4.8)
Purchases of marketable securities			0
Proceeds from the sale or maturity of marketable securities			0
Decrease (increase) in restricted cash		0	(0.5)
Net principal increase of mortgage loans held in portfolio and real estate owned		0
Payments to Acquire Other Investments			0
Payments for (Proceeds from) Other Investing Activities		0	0
Payment related to acquisition of a business		0	0
Net cash (used in) provided by investing activities		(15.1)	(5.3)
FINANCING ACTIVITIES
Proceeds from Notes Payable		0	0
Repayments of Notes Payable		0	0
Proceeds from (Payments for) Other Financing Activities	32.0	158.6	497.5
Proceeds from stock associated with certain employee benefit plans		0	0
Income tax benefit from employee stock awards		0
Cash dividends paid		0	0
Net cash provided by (used in) financing activities		158.6	497.5
(Decrease) increase in cash and cash equivalents		24.6	8.0
Cash and cash equivalents at beginning of period	38.4	38.4	56.3
Cash and cash equivalents at end of period		63.0	64.3
Non-Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES
Net cash used in operating activities		61.9	(16.1)
INVESTING ACTIVITIES
Purchases of property and equipment		(5.4)	(7.6)
Purchases of marketable securities			0
Proceeds from the sale or maturity of marketable securities			0
Decrease (increase) in restricted cash		0.1	0
Net principal increase of mortgage loans held in portfolio and real estate owned		(1.7)
Payments to Acquire Other Investments			0
Payments for (Proceeds from) Other Investing Activities		0	0
Payment related to acquisition of a business		0	0
Net cash (used in) provided by investing activities		(7.0)	(7.6)
FINANCING ACTIVITIES
Proceeds from Notes Payable		0	58.0
Repayments of Notes Payable		(14.8)	0
Proceeds from (Payments for) Other Financing Activities		(1.2)	(2.2)
Proceeds from stock associated with certain employee benefit plans		0	0
Income tax benefit from employee stock awards		0
Cash dividends paid		(40.0)	(30.0)
Net cash provided by (used in) financing activities		(56.0)	25.8
(Decrease) increase in cash and cash equivalents		(1.1)	2.1
Cash and cash equivalents at beginning of period	26.7	26.7	22.5
Cash and cash equivalents at end of period		25.6	24.6
Eliminations [Member]
OPERATING ACTIVITIES
Net cash used in operating activities		(40.0)	(30.0)
INVESTING ACTIVITIES
Purchases of property and equipment		0	0
Purchases of marketable securities			0
Proceeds from the sale or maturity of marketable securities			0
Decrease (increase) in restricted cash		0	0
Net principal increase of mortgage loans held in portfolio and real estate owned		0
Payments to Acquire Other Investments			0
Payments for (Proceeds from) Other Investing Activities		157.4	495.3
Payment related to acquisition of a business		0	0
Net cash (used in) provided by investing activities		157.4	495.3
FINANCING ACTIVITIES
Proceeds from Notes Payable		0	0
Repayments of Notes Payable		0	0
Proceeds from (Payments for) Other Financing Activities		(157.4)	(495.3)
Proceeds from stock associated with certain employee benefit plans		0	0
Income tax benefit from employee stock awards		0
Cash dividends paid		40.0	30.0
Net cash provided by (used in) financing activities		(117.4)	(465.3)
(Decrease) increase in cash and cash equivalents		0	0
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period		$ 0	$ 0