DERIVATIVE FINANCIAL INSTRUMENTS, Interest Rate Derivatives (Details) (Interest Rate Swap [Member], USD $) In Millions	Sep. 30, 2011	Sep. 30, 2010
Derivative [Line Items]
Maximum loss exposure on interest rate derivatives	$ 39
Derivative Asset Position [Member]
Derivative [Line Items]
Cash collateral included in net fair value of all open derivative positions, aggregate net asset		10.6
Cash collateral included in net fair value of all open derivative positions, aggregate net liability	19.0
Derivative Liability Position [Member]
Derivative [Line Items]
Cash collateral included in net fair value of all open derivative positions, aggregate net asset	37.0
Cash collateral included in net fair value of all open derivative positions, aggregate net liability		$ 1.8

Maximum loss exposure on the interest rate derivatives.

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- Definition

The amount of the obligation to return cash collateral under master netting arrangements that have not been offset against net derivative instrument positions.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41678-113959

-Subparagraph (b)

+ Details

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- Definition

The amount of the right to reclaim cash collateral under master netting arrangements that have not been offset against net derivative instrument positions.

+ References

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

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