Amount of Loss for gas purchase options deferred under loss procedures

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Percentage of total gas costs approved for recovery under terms and conditions of Tennessee Incentive Plan (TIP) approved by the TRA

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Total value as of the balance sheet date that were accounted for at fair value

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Fair value of a derivative asset that is not designated or qualifying as a hedging instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 205G

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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Loss included in earnings for the period from the change in fair value of derivative instruments not designated as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 45
-Subparagraph b(1)(b)

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This element represents a certain statement of financial position asset caption which represents a class of assets, or which may include an individual asset, measured at fair value on a recurring basis.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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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.

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Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
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-Paragraph 20, 22
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Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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Financial Instruments & Related Fair Value (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010	Oct. 31, 2010
Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items]
Derivatives Held For Distribution Operations	$ 1,413		$ 1,413		$ 2,819
Total trading securities	1,536		1,536		1,002
Total Fair Value Assets	2,949		2,949		3,821
Long Term Debt Fair Value	840,396		840,396		890,277
Long Term Debt Carrying Value	735,000		735,000		731,922
Gas Options Total Coverage	25,600,000				33,500,000
Amount Of Loss Recognized On Derivatives	1,687	16,910	7,812	50,686
Amount Of Loss Deferred Under PGA Procedures	1,687	16,910	7,812	50,686
Percentage Of Annual Gas Costs Approved For Recovery Under TIP	1.00%
Money markets \| Quoted Prices In Active Markets [Member]
Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items]
Total trading securities	220		220		254
Mutual funds \| Quoted Prices In Active Markets [Member]
Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items]
Total trading securities	1,316		1,316		748
Quoted Prices In Active Markets [Member]
Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items]
Derivatives Held For Distribution Operations	1,413		1,413		2,819
Total Fair Value Assets	2,949		2,949		3,821
Money markets \| Significant Other Observable Inputs [Member]
Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items]
Total trading securities	0		0		0
Mutual funds \| Significant Other Observable Inputs [Member]
Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items]
Total trading securities	0		0		0
Significant Other Observable Inputs [Member]
Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items]
Derivatives Held For Distribution Operations	0		0		0
Total Fair Value Assets	0		0		0
Money markets \| Significant Unobservable Inputs [Member]
Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items]
Total trading securities	0		0		0
Mutual funds \| Significant Unobservable Inputs [Member]
Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items]
Total trading securities	0		0		0
Significant Unobservable Inputs [Member]
Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items]
Derivatives Held For Distribution Operations	0		0		0
Total Fair Value Assets	0		0		0
Money markets
Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items]
Total trading securities	220		220		254
Mutual funds
Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items]
Total trading securities	1,316		1,316		748
Current Assets [Member]
Derivative [Line Items]
Gas Purchase Options Current Assets	$ 1,413		$ 1,413		$ 2,819