Selected Balance Sheet Data

9 Months Ended

Sep. 30, 2023

Balance Sheet Related Disclosures [Abstract]

Selected Balance Sheet Data

(Millions of Dollars)	Sept. 30, 2023		Dec. 31, 2022
Accounts receivable, net
Accounts receivable	$	1,347	$	1,495
Less allowance for bad debts	(127)		(122)
Accounts receivable, net	$	1,220	$	1,373

(Millions of Dollars)	Sept. 30, 2023		Dec. 31, 2022
Inventories
Materials and supplies	$	368	$	330
Fuel	193		201
Natural gas	127		272
Total inventories	$	688	$	803

(Millions of Dollars)	Sept. 30, 2023		Dec. 31, 2022
Property, plant and equipment, net
Electric plant	$	51,377	$	49,639
Natural gas plant	9,005		8,514
Common and other property	3,227		2,970
Plant to be retired (a)	2,109		2,217
Construction work in progress	2,951		2,124
Total property, plant and equipment	68,669		65,464
Less accumulated depreciation	(18,363)		(17,502)
Nuclear fuel	3,282		3,183
Less accumulated amortization	(2,975)		(2,892)
Property, plant and equipment, net	$	50,613	$	48,253

(a)Amounts include Sherco Units 1, 2 and 3 and A.S. King for NSP-Minnesota; Comanche Units 2 and 3, Craig Units 1 and 2, Hayden Units 1 and 2 and coal generation assets at Pawnee pending facility gas conversion for PSCo; and Tolk and coal generation assets at Harrington pending facility gas conversion for SPS. Amounts are presented net of accumulated depreciation.