Schedule II, Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2023

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule II, Valuation and Qualifying Accounts

Southwestern Public Service Co. Valuation and Qualifying Accounts Years Ended Dec. 31

	Allowance for bad debts
(Millions of Dollars)	2023		2022		2021
Balance at Jan. 1	$	13	$	12	$	8
Additions charged to costs and expenses	11		9		6
Additions charged to other accounts (a)	1		1		3
Deductions from reserves (b)	(10)		(9)		(5)
Balance at Dec. 31	$	15	$	13	$	12

(a)Recovery of amounts previously written-off.

(b)Deductions related primarily to bad debt write-offs.