XML 98 R42.htm IDEA: XBRL DOCUMENT v3.25.3
Summary of Significant Accounting Policies [Table Text Block]
 12 Months Ended
Sep. 30, 2025
Accounting Policies [Abstract]  
Property, Plant, and Equipment Depreciation Rates Average depreciation rates by asset class are as follows:
Property, Plant, and Equipment Depreciation Rates
At September 30
(percent)
202520242023
Asset Class
Nuclear2.71 2.71 2.73 
Coal-fired(1)
4.82 4.13 4.98 
Hydroelectric1.82 1.83 1.82 
Gas and oil-fired3.16 3.31 3.17 
Transmission1.55 1.52 1.52 
Other5.22 4.98 4.43 
Schedule of Cash and Cash Equivalents The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported on the Consolidated Balance Sheets and Consolidated Statements of Cash Flows:
Cash, Cash Equivalents, and Restricted Cash
At September 30
(in millions)
 20252024
Cash and cash equivalents$1,576 $502 
Restricted cash and cash equivalents included in Other long-term assets21 21 
Total cash, cash equivalents, and restricted cash$1,597 $523