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Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2020

Significant affiliate transactions among the companies and related parties for the years ended Dec. 31:


(Millions of Dollars)	2020		2019		2018
Operating revenues:

Other	$	5	$	5	$	4
Operating expenses:
Other operating expenses — paid to Xcel Energy Services Inc.	571		532		519

Accounts receivable and payable with affiliates at Dec. 31:


	2020				2019
(Millions of Dollars)	Accounts Receivable		Accounts Payable		Accounts Receivable		Accounts Payable
NSP-Minnesota	$	—	$	1	$	19	$	—
NSP-Wisconsin	—		1		—		—
SPS	—		6		—		—
Other subsidiaries of Xcel Energy Inc.	8		50		34		44
	$	8	$	58	$	53	$	44