XML 65 R50.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Capitalized Interest Capitalized Interest (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Real Estate Inventory, Capitalized Interest Costs [Roll Forward] |  |  |
Capitalized interest, beginning of year | $ 208.0 | $ 198.5 | $ 137.1
Interest incurred | 152.3 | 169.2 | 185.8
Interest expensed: |  |  |
Charged to cost of sales | (169.0) | (159.4) | (123.1)
Written off with inventory impairments | (0.1) | (0.3) | (1.3)
Capitalized interest, end of year | 191.2 | 208.0 | 198.5
Financial Services [Member] |  |  |
Real Estate Inventory, Capitalized Interest Costs [Roll Forward] |  |  |
Interest incurred | $ 8.4 | $ 7.4 | $ 4.5

X
- Definition The amount of interest costs that had been capitalized to inventory which were written off with inventory impairments during the period. + References No definition available. + Details
Name: | dhi_CapitalizedInterestCostsWrittenOffWithInventoryImpairments
Namespace Prefix: | dhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total interest costs incurred during the period and either capitalized or charged against earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
Name: | us-gaap_InterestCostsIncurred
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InterestExpenseAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of interest costs that were capitalized to properties under development during the land development and construction period of a project, and which are included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
Name: | us-gaap_RealEstateInventoryCapitalizedInterestCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of interest cost charged to cost of sales that had been previously capitalized to inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
Name: | us-gaap_RealEstateInventoryCapitalizedInterestCostsCostOfSales1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_RealEstateInventoryCapitalizedInterestCostsRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=dhi_FinancialServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |