Selected Balance Sheet Data

6 Months Ended

Jun. 30, 2022

Balance Sheet Related Disclosures [Abstract]

Selected Balance Sheet Data

(Millions of Dollars)	June 30, 2022		Dec. 31, 2021
Accounts receivable, net
Accounts receivable	$	502	$	474
Less allowance for bad debts	(45)		(45)
Accounts receivable, net	$	457	$	429

(Millions of Dollars)	June 30, 2022		Dec. 31, 2021
Inventories
Materials and supplies	$	190	$	181
Fuel	106		81
Natural gas	32		47
Total inventories	$	328	$	309

(Millions of Dollars)	June 30, 2022		Dec. 31, 2021
Property, plant and equipment, net
Electric plant	$	19,826	$	19,154
Natural gas plant	1,940		1,864
Common and other property	1,083		1,007
Plant to be retired (a)	682		719
Construction work in progress	896		984
Total property, plant and equipment	24,427		23,728
Less accumulated depreciation	(7,938)		(7,606)
Nuclear fuel	3,096		3,081
Less accumulated amortization	(2,834)		(2,773)
Property, plant and equipment, net	$	16,751	$	16,430

(a)Amounts include regulator-approved retirements of Sherco Units 1, 2 and 3 and A.S. King and are reported net of accumulated depreciation.