Commitments and Contingencies (Details 1) - Homebuilding [Member] - USD ($) $ in Millions	9 Months Ended
Jun. 30, 2016	Jun. 30, 2015
Rollforward of reserves for legal claims
Reserves for legal claims, beginning of period	$ 451.0	$ 456.9
Increase in reserves	15.2	31.2
Payments	(39.8)	(37.4)
Reserves for legal claims, end of period	$ 426.4	$ 450.7

Amount of loss contingency liability.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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Amount of increase (decrease) in loss contingency liability.

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Amount of cash outflow reducing loss contingency liability.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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