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Selected Balance Sheet Data (Tables)
 9 Months Ended
Sep. 30, 2024
Balance Sheet Related Disclosures [Abstract]  
Accounts Receivable, Net
(Millions of Dollars)Sept. 30, 2024Dec. 31, 2023
Accounts receivable, net
Accounts receivable$179 $237 
Less allowance for bad debts(12)(15)
Accounts receivable, net$167 $222 
Inventories
(Millions of Dollars)Sept. 30, 2024Dec. 31, 2023
Inventories
Materials and supplies$58 $56 
Fuel9 13 
Total inventories$67 $69 
Property, Plant and Equipment, Net
3. Selected Balance Sheet Data
(Millions of Dollars)Sept. 30, 2024Dec. 31, 2023
Accounts receivable, net
Accounts receivable$179 $237 
Less allowance for bad debts(12)(15)
Accounts receivable, net$167 $222 
(Millions of Dollars)Sept. 30, 2024Dec. 31, 2023
Inventories
Materials and supplies$58 $56 
Fuel9 13 
Total inventories$67 $69 
(Millions of Dollars)Sept. 30, 2024Dec. 31, 2023
Property, plant and equipment, net
Electric plant$11,141 $10,752 
Plant to be retired (a)
189 248 
CWIP546 226 
Total property, plant and equipment11,876 11,226 
Less accumulated depreciation(2,882)(2,690)
Property, plant and equipment, net$8,994 $8,536 
(a)Amounts include Tolk and coal generation assets at Harrington pending facility gas conversion. Amounts are reported net of accumulated depreciation.