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Income Taxes Income Taxes (Parenthetical) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2008	Sep. 30, 2007
Income Tax Disclosure [Abstract]
Income Tax Examination, Penalties and Interest Expense	$ 0
Income Tax Examination, Year under Examination		2010	2009	2008	2007

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- Definition

The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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- Definition

Tax year being audited in the income tax examination, in CCYY format.

+ References

No definition available.

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