Selected Balance Sheet Data (Tables)

9 Months Ended

Sep. 30, 2022

Balance Sheet Related Disclosures [Abstract]

Accounts Receivable, Net

(Millions of dollars)	Sept. 30, 2022		Dec. 31, 2021
Accounts receivable, net
Accounts receivable	$	76	$	79
Less allowance for bad debts	(8)		(8)
Accounts receivable, net	$	68	$	71

Inventories

(Millions of dollars)	Sept. 30, 2022		Dec. 31, 2021
Inventories
Materials and supplies	$	8	$	8
Fuel	12		9
Natural gas	25		10
Total inventories	$	45	$	27

Property, Plant and Equipment, Net

(Millions of dollars)	Sept. 30, 2022		Dec. 31, 2021
Property, plant and equipment, net
Electric plant	$	3,507	$	3,348
Natural gas plant	445		423
Common and other property	255		233
Construction work in progress	157		134
Total property, plant and equipment	4,364		4,138
Less accumulated depreciation	(1,544)		(1,478)
Property, plant and equipment, net	$	2,820	$	2,660