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Stock-based Compensation Plans Schedule of shared-based compensation, performance units (Details)	12 Months Ended			3 Months Ended				12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2013 Performance Shares [Member] Share-based Compensation Award, Tranche Three [Member]	Dec. 31, 2012 Performance Shares [Member] Share-based Compensation Award, Tranche Three [Member]	Dec. 31, 2013 Performance Shares [Member] Share-based Compensation Award, Tranche Two [Member]	Dec. 31, 2012 Performance Shares [Member] Share-based Compensation Award, Tranche Two [Member]	Sep. 30, 2014 Performance Shares [Member] Share-based Compensation Award, Tranche Two [Member]	Dec. 31, 2013 Performance Shares [Member] Share-based Compensation Award, Tranche One [Member]	Sep. 30, 2013 Performance Shares [Member] Share-based Compensation Award, Tranche One [Member]	Dec. 31, 2014 Scenario, Forecast [Member] Performance Shares [Member] Share-based Compensation Award, Tranche Three [Member]	Sep. 30, 2016 Scenario, Forecast [Member] Performance Shares [Member] Share-based Compensation Award, Tranche Three [Member]	Dec. 31, 2014 Scenario, Forecast [Member] Performance Shares [Member] Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	381,012	509,338	1,406,318	90,849	135,552	90,841	135,553		90,841	135,553
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	1,099,591	995,037	867,451					271,106	181,682	271,106	0	0	0

X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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