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Income Taxes (Summary of Valuation Allowance) (Details) (USD $) In Millions, unless otherwise specified |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2014 Continuing Operations [Member] | Sep. 30, 2013 Continuing Operations [Member] | Sep. 30, 2014 Discontinued Operations [Member] | Sep. 30, 2013 Discontinued Operations [Member] | Sep. 30, 2014 Accumulated Other Comprehensive Income (Loss) [Member] | Sep. 30, 2013 Accumulated Other Comprehensive Income (Loss) [Member] | Sep. 30, 2014 Other Assets [Member] | Sep. 30, 2013 Other Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year | $ 0.7 | $ 10.3 | $ 49.2 |  |  |  |  |  |  |  |
Valuation Allowance, Deferred Tax Asset, Change in Amount |  |  |  | (9.6) | (8.5) | 0 | (2.1) | 0 | (27.8) | 0 | (0.5)
Balance at end of year | $ 0.7 | $ 10.3 | $ 49.2 |  |  |  |  |  |  |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32123-109318 + Details
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