Name:	dei_EntityInformationLineItems
Namespace Prefix:	dei_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Business Acquisition, Backlog Acquired

No definition available.

Name:	dhi_BusinessAcquisitionBacklogAcquired
Namespace Prefix:	dhi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Business Acquisition, Number of Homes Acquired

No definition available.

Name:	dhi_BusinessAcquisitionNumberOfHomesAcquired
Namespace Prefix:	dhi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Business Acquisition, Number of Lots Acquired

No definition available.

Name:	dhi_BusinessAcquisitionNumberOfLotsAcquired
Namespace Prefix:	dhi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-13