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Statement of Cash Flows, Supplemental Disclosures
6 Months Ended
Mar. 31, 2025
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, 2025 and 2024, were $953 million and $568 million, respectively, and are excluded from the Consolidated Statements of Cash Flows for the six months ended March 31, 2025 and 2024 as non-cash investing activities. ARO project accruals included in Accounts payable and accrued liabilities at March 31, 2025 and 2024, were $35 million and $47 million, respectively, and are excluded from the Consolidated Statements of Cash Flows for the six months ended March 31, 2025 and 2024, as non-cash operating 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.