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Risk Management Activities and Derivative Transactions Risk Management Activities and Derivative Transactions - Counterparty Credit Risk (Details)	Sep. 30, 2015 USD ($) Megawatts Customers merchants	Apr. 14, 2015 Megawatts	Sep. 30, 2014 Customers
Derivative
Counterparty credit rating outlier | $	$ 1
Number of active future commission merchants | merchants	2
Megawatts		700
Credit of Customers
Derivative
Number of customers that represent the percent of outstanding accounts receivable | Customers	3		3
Percent of total outstanding accounts receivables by customers	27.00%		27.00%
Power Purchase Agreement
Derivative
Megawatts	440

X

- Definition

Number of suppliers whose credit rating is outlier

+ References

No definition available.

+ Details

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- Definition

Megawatts of summer net capability

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X

- Definition

Number of active future commission merchants to clear commodity contracts.

+ References

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+ Details

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X

- Definition

The number of customers that represent the percent of outstanding accounts receivable.

+ References

No definition available.

+ Details

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- Definition

The percent of total outstanding accounts receivables represented by a certain number of customers.

+ References

No definition available.

+ 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.

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- Details

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