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Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2023

Significant affiliate transactions among the companies and related parties including billings under the Interchange Agreement for the years ended Dec. 31:


(Millions of Dollars)	2023		2022		2021
Operating revenues:
Electric	$	204	$	202	$	189
Operating expenses:
Purchased power (a)	424		445		408
Transmission expense	69		68		64
Natural gas purchased for resale	1		—		1
Other operating expenses — paid to Xcel Energy Services Inc.	119		114		99
Interest income	1		—		—
Interest expense	1		1		—

(a)Amount includes $16 million deferred fuel cost regulatory asset for the year ended Dec. 31 2023, and an immaterial amount of fuel costs amortized or deferred for the years ended Dec. 31, 2022 and 2021.

Accounts receivable and payable with affiliates at Dec. 31 were:


	2023				2022
(Millions of Dollars)	Accounts Receivable		Accounts Payable		Accounts Receivable		Accounts Payable
NSP-Minnesota	$	—	$	9	$	—	$	4
PSCo	1		—		2		—
Other subsidiaries of Xcel Energy Inc.	12		13		6		15
	$	13	$	22	$	8	$	19