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Capitalized Interest (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Rollforward of capitalized interest |  |  |  |
Capitalized interest, beginning of period | $ 173.9 | $ 170.1 | $ 162.7 | $ 167.9
Interest incurred | 38.1 | 31.0 | 104.8 | 93.8
Interest charged to cost of sales | (34.3) | (35.4) | (89.8) | (96.0)
Capitalized interest, end of period | 177.7 | 165.7 | 177.7 | 165.7
Financial Services [Member] |  |  |  |
Rollforward of capitalized interest |  |  |  |
Interest incurred | 4.5 | 3.4 | 10.8 | 7.9
Forestar Group [Member] |  |  |  |
Rollforward of capitalized interest |  |  |  |
Interest incurred | $ 7.9 | $ 0.9 | $ 10.7 | $ 2.3

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- Definition Total interest costs incurred during the period and either capitalized or charged against earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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
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- 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://fasb.org/us-gaap/role/ref/legacyRef -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
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- Definition Amount of interest cost charged to cost of sales that had been previously capitalized to inventory. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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
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- 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
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