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Statement of Cash Flows, Supplemental Disclosures
3 Months Ended
Dec. 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 December 31, 2021 and 2020, were $417 million and $273 million, respectively, and are excluded from the Consolidated Statements of Cash Flows for the three months ended December 31, 2021 and 2020, as non-cash investing activities.

Cash flows from swap contracts that are accounted for as hedges are classified in the same category as the item being hedged or on a basis consistent with the nature of the instrument.