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Statement of Cash Flows, Supplemental Disclosures	6 Months Ended
	Mar. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Cash Flow, Supplemental Disclosures	Supplemental Cash Flow Information     Construction in progress and Nuclear fuel expenditures included in Accounts payable and accrued liabilities at March 31, 2021 and 2020, were $394 million and $295 million, respectively, and are excluded from the Statements of Consolidated Cash Flows for the six months ended March 31, 2021 and 2020, as non-cash investing activities. Excluded from the Statements of Consolidated Cash Flows for the six months ended March 31, 2021, were non-cash investing and financing activities of $233 million related primarily to an increase in lease assets and liabilities incurred for a finance lease that was amended in March 2021.

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- Definition

The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-URI http://asc.fasb.org/topic&trid=2134446

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- References

No definition available.

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