Selected Balance Sheet Data

6 Months Ended

Jun. 30, 2021

Balance Sheet Related Disclosures [Abstract]

Selected Balance Sheet Data

(Millions of dollars)	June 30, 2021		Dec. 31, 2020
Accounts receivable, net
Accounts receivable	$	68	$	78
Less allowance for bad debts	(7)		(8)
Accounts receivable, net	$	61	$	70

(Millions of dollars)	June 30, 2021		Dec. 31, 2020
Inventories
Materials and supplies	$	7	$	7
Fuel	5		4
Natural gas	3		4
Total inventories	$	15	$	15

(Millions of dollars)	June 30, 2021		Dec. 31, 2020
Property, plant and equipment, net
Electric plant	$	3,253	$	3,197
Natural gas plant	402		391
Common and other property	224		221
Construction work in progress	99		71
Total property, plant and equipment	3,978		3,880
Less accumulated depreciation	(1,437)		(1,396)
Property, plant and equipment, net	$	2,541	$	2,484