Supplemental Guarantor Information (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Mar. 31, 2014	Jun. 30, 2014	Jun. 30, 2013
OPERATING ACTIVITIES
Net cash used in operating activities		$ (575.1)	$ (1,136.3)
INVESTING ACTIVITIES
Purchases of property and equipment		(49.9)	(40.6)
Purchases of marketable securities		0	(28.9)
Proceeds from the sale or maturity of marketable securities		0	325.4
Decrease (increase) in restricted cash		57.7	(19.3)
Net principal increase of mortgage loans held in portfolio and real estate owned		(2.8)	(1.0)
Payments to Acquire Other Investments		0	(18.6)
Principal payments received on debt securities collateralized by residential real estate		0	1.4
Payments for (Proceeds from) Other Investing Activities		0	0
Payment related to acquisition of a business		(222.7)	(9.4)
Net cash used in investing activities		(217.7)	209.0
FINANCING ACTIVITIES
Proceeds from Notes Payable		686.3	892.0
Repayments of Notes Payable		(273.9)	(342.1)
Proceeds from (Payments for) Other Financing Activities		0	0
Proceeds from stock associated with certain employee benefit plans		43.1	27.9
Income tax benefit from employee stock awards		1.6	0
Cash dividends paid		(25.8)	(60.2)
Net cash provided by financing activities		431.3	517.6
(Decrease) increase in cash and cash equivalents		(361.5)	(409.7)
Cash and cash equivalents at beginning of period		936.5	1,047.7
Cash and cash equivalents at end of period		575.0	638.0
D.R. Horton, Inc. [Member]
OPERATING ACTIVITIES
Net cash used in operating activities	32.0	(259.5)	(440.1)
INVESTING ACTIVITIES
Purchases of property and equipment		(17.9)	(21.7)
Purchases of marketable securities			(28.9)
Proceeds from the sale or maturity of marketable securities			325.4
Decrease (increase) in restricted cash		58.2	(18.5)
Net principal increase of mortgage loans held in portfolio and real estate owned		0	0
Payments to Acquire Other Investments			0
Principal payments received on debt securities collateralized by residential real estate			0
Payments for (Proceeds from) Other Investing Activities	(32.0)	(329.0)	(714.3)
Payment related to acquisition of a business		(222.7)	(9.4)
Net cash used in investing activities		(511.4)	(467.4)
FINANCING ACTIVITIES
Proceeds from Notes Payable		622.0	860.1
Repayments of Notes Payable		(273.9)	(342.1)
Proceeds from (Payments for) Other Financing Activities		0	0
Proceeds from stock associated with certain employee benefit plans		43.1	27.9
Income tax benefit from employee stock awards		1.6
Cash dividends paid		(25.8)	(60.2)
Net cash provided by financing activities		367.0	485.7
(Decrease) increase in cash and cash equivalents		(403.9)	(421.8)
Cash and cash equivalents at beginning of period		871.4	968.9
Cash and cash equivalents at end of period		467.5	547.1
Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES
Net cash used in operating activities	(32.0)	(281.7)	(688.7)
INVESTING ACTIVITIES
Purchases of property and equipment		(23.7)	(15.4)
Purchases of marketable securities			0
Proceeds from the sale or maturity of marketable securities			0
Decrease (increase) in restricted cash		(0.6)	(0.8)
Net principal increase of mortgage loans held in portfolio and real estate owned		0	0
Payments to Acquire Other Investments			(18.6)
Principal payments received on debt securities collateralized by residential real estate			1.4
Payments for (Proceeds from) Other Investing Activities		0	0
Payment related to acquisition of a business		0	0
Net cash used in investing activities		(24.3)	(33.4)
FINANCING ACTIVITIES
Proceeds from Notes Payable		0	0
Repayments of Notes Payable		0	0
Proceeds from (Payments for) Other Financing Activities	32.0	332.7	724.2
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 financing activities		332.7	724.2
(Decrease) increase in cash and cash equivalents		26.7	2.1
Cash and cash equivalents at beginning of period		38.4	56.3
Cash and cash equivalents at end of period		65.1	58.4
Non-Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES
Net cash used in operating activities		6.1	22.5
INVESTING ACTIVITIES
Purchases of property and equipment		(8.3)	(3.5)
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		(2.8)	(1.0)
Payments to Acquire Other Investments			0
Principal payments received on debt securities collateralized by residential real estate			0
Payments for (Proceeds from) Other Investing Activities		0	0
Payment related to acquisition of a business		0	0
Net cash used in investing activities		(11.0)	(4.5)
FINANCING ACTIVITIES
Proceeds from Notes Payable		64.3	31.9
Repayments of Notes Payable		0	0
Proceeds from (Payments for) Other Financing Activities		(3.7)	(9.9)
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 financing activities		20.6	(8.0)
(Decrease) increase in cash and cash equivalents		15.7	10.0
Cash and cash equivalents at beginning of period		26.7	22.5
Cash and cash equivalents at end of period		42.4	32.5
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	0
Payments to Acquire Other Investments			0
Principal payments received on debt securities collateralized by residential real estate			0
Payments for (Proceeds from) Other Investing Activities		329.0	714.3
Payment related to acquisition of a business		0	0
Net cash used in investing activities		329.0	714.3
FINANCING ACTIVITIES
Proceeds from Notes Payable		0	0
Repayments of Notes Payable		0	0
Proceeds from (Payments for) Other Financing Activities		(329.0)	(714.3)
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 financing activities		(289.0)	(684.3)
(Decrease) increase in cash and cash equivalents		0	0
Cash and cash equivalents at beginning of period		0	0
Cash and cash equivalents at end of period		$ 0	$ 0