Commitments and Contingencies Commitments and Contingencies (Details 1) - Homebuilding [Member] - USD ($) $ in Millions	3 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Rollforward of reserves for legal claims
Reserves for legal claims, beginning of period	$ 451.0	$ 456.9
Increase in reserves	21.8	12.9
Payments	(13.9)	(12.2)
Reserves for legal claims, end of period	$ 458.9	$ 457.6

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 payments made reducing loss contingency liability.

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Amount of increase (decrease) in loss contingency liability.

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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.

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