Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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- Definition

Maximum length of time hedged in price risk cash flow hedges.

+ References

No definition available.

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- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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- Definition

The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

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- Definition

The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

+ References

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- Definition

Maximum period the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

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- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Derivative Instruments and Hedging Activities (Details)	6 Months Ended									6 Months Ended			6 Months Ended
Derivative Instruments and Hedging Activities (Details)	Mar. 31, 2015 USD ($) gal	Mar. 31, 2014 USD ($) gal	Sep. 30, 2014 USD ($)	Mar. 31, 2015 Brokerage Accounts USD ($)	Mar. 31, 2014 Brokerage Accounts USD ($)	Mar. 31, 2015 Interest Rate Swaps EUR (€)	Mar. 31, 2014 Interest Rate Swaps EUR (€)	Mar. 31, 2015 Interest Rate Protection Agreements USD ($)	Mar. 31, 2014 Interest Rate Protection Agreements USD ($)	Mar. 31, 2015 Foreign Currency USD ($)	Mar. 31, 2014 Foreign Currency USD ($)	Sep. 30, 2013 Cross Currency Contracts USD ($)	Mar. 31, 2015 Gas Utility MMBTU	Mar. 31, 2014 Gas Utility MMBTU	Mar. 31, 2015 Electric Utility kWh	Mar. 31, 2014 Electric Utility kWh	Mar. 31, 2015 Midstream & Marketing Electricity (millions of kilowatt-hours) Forward Purchase Contracts kWh	Mar. 31, 2014 Midstream & Marketing Electricity (millions of kilowatt-hours) Forward Purchase Contracts kWh	Mar. 31, 2015 Midstream & Marketing Electricity (millions of kilowatt-hours) Forward Sales Contracts kWh	Mar. 31, 2014 Midstream & Marketing Electricity (millions of kilowatt-hours) Forward Sales Contracts kWh	Mar. 31, 2015 Midstream & Marketing Propane Storage (millions of dekatherms) Forward Sales Contracts gal	Mar. 31, 2014 Midstream & Marketing Propane Storage (millions of dekatherms) Forward Sales Contracts gal	Mar. 31, 2015 Midstream & Marketing Gas Utility Natural Gas Forward Purchase Contracts MMBTU	Mar. 31, 2014 Midstream & Marketing Gas Utility Natural Gas Forward Purchase Contracts MMBTU	Mar. 31, 2015 Midstream & Marketing Natural Gas Storage Forward Sales Contracts MMBTU	Mar. 31, 2014 Midstream & Marketing Natural Gas Storage Forward Sales Contracts MMBTU	Mar. 31, 2015 Midstream & Marketing FTR and NYISO Contracts Electric transmission congestion (excluding Electric Utility) kWh	Mar. 31, 2014 Midstream & Marketing FTR and NYISO Contracts Electric transmission congestion (excluding Electric Utility) kWh	Mar. 31, 2015 Net Investment Hedging EUR (€)	Mar. 31, 2014 Net Investment Hedging EUR (€)
Derivative
Volume of LPG commodity derivatives (in gallons)	362,500,000	121,900,000																			0	0
Derivative, Notional Amount						€ 401,100,000	€ 439,800,000	$ 0	$ 0	$ 223,500,000	$ 199,400,000	$ 52,000,000																	€ 0	€ 0
Maximum length of time hedging exposure to LPG commodity price risk	45 months
Notional amount													9,700,000	9,000,000	384,400,000	207,000,000	356,000,000	603,100,000	315,400,000	346,100,000			61,600,000	65,100,000	600,000	100,000	124,600,000	482,500,000
Maximum length of time hedged in price risk cash flow hedges										35 months			12 months		14 months		24 months		18 months				42 months				2 months
Amount of net losses associated with interest rate hedges to be reclassified with interest rate hedges during the next 12 months	2,600,000
Amount of net gains associated with currency rate risk to be reclassified into earnings during the next 12 months	19,500,000
Restricted cash	$ 56,700,000	$ 4,400,000	$ 16,600,000	$ 56,700,000	$ 4,400,000