Supplemental Information (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2015 |
Jun. 30, 2015 |
[1] | Mar. 31, 2015 |
[1] | Dec. 31, 2014 |
[1] | Sep. 30, 2013 |
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2013 |
|||||||||
Supplemental Information [Line Items] | |||||||||||||||||||
Gain on land sales | $ 37.1 | $ 9.7 | $ 20.0 | ||||||||||||||||
Advisory costs | 0.0 | 0.0 | 10.1 | ||||||||||||||||
Advisory costs, after-tax | $ 6.4 | ||||||||||||||||||
Advisory costs, per share | $ 0.03 | ||||||||||||||||||
Segment Reconciling Items [Member] | |||||||||||||||||||
Supplemental Information [Line Items] | |||||||||||||||||||
Gain on land sales | $ 33.6 | [1] | $ 0.0 | $ 0.0 | $ 0.0 | 33.6 | [1],[2] | 0.0 | [2] | 0.0 | [2] | ||||||||
Gain on land sales, after-tax | $ 28.3 | ||||||||||||||||||
Gain on land sales, per share | $ 0.13 | ||||||||||||||||||
Advisory costs | $ 0.0 | $ 0.0 | $ 10.1 | ||||||||||||||||
|