Banking Counterparties Credit Rating

No definition available.

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- Definition

Megawatts of summer net capability

+ References

No definition available.

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- Definition

Natural Gas Banking Counterparties Credit Rating

+ References

No definition available.

+ Details

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- Definition

This concept explains the total percentage of operating revenue provided by the two largest customers.

+ References

No definition available.

+ Details

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- Definition

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4531-111522

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- Definition

Fair value of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, not subject to a master netting arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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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.

+ References

No definition available.

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Risk Management Activities and Derivative Transactions Counterparty Credit Risk (Details) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2021 USD ($) megawatts	Mar. 31, 2021 USD ($) megawatts	Sep. 30, 2020 USD ($)
Derivative
Accounts Receivable, before Allowance for Credit Loss, Current	$ 1,204	$ 1,204	$ 1,401
Total derivatives not subject to master netting or similar arrangement	$ 32	$ 32	$ 49
Two Largest Customer Percentage of Total Operating Revenue	1600.00%
Moody's, A1 Rating [Member]
Derivative
Banking Counterparties Credit Rating		A2
Natural Gas Banking Counterparties Credit Rating		A1
Moody's, Caa1 Rating [Member]
Derivative
Natural Gas Banking Counterparties Credit Rating		B1
Long-term Contract for Purchase of Electric Power [Domain]
Derivative
Megawatts \| megawatts	440	440