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Selected Balance Sheet Data (Tables)

6 Months Ended

Jun. 30, 2025

Balance Sheet Related Disclosures [Abstract]

Accounts receivable, net

(Millions of Dollars)						June 30, 2025						Dec. 31, 2024
Accounts receivable, net
Accounts receivable						$	1,228					$	1,360
Less allowance for bad debts						(95)						(111)
Accounts receivable, net						$	1,133					$	1,249

Inventories

(Millions of Dollars)						June 30, 2025						Dec. 31, 2024
Inventories
Materials and supplies						$	441					$	406
Fuel						171						164
Natural gas						56						96
Total inventories						$	668					$	666

Property, plant and equipment, net

(Millions of Dollars)						June 30, 2025						Dec. 31, 2024
Property, plant and equipment, net
Electric plant						$	58,815					$	56,791
Natural gas plant						10,044						9,834
Common and other property						3,612						3,515
Plant to be retired (a)						1,664						1,793
Construction work in progress						6,611						4,720
Total property, plant and equipment						80,746						76,653
Less accumulated depreciation						(20,469)						(19,852)
Nuclear fuel						3,623						3,491
Less accumulated amortization						(3,149)						(3,094)
Property, plant and equipment, net						$	60,751					$	57,198

(a)Amounts include Sherco 1 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 Unit 1 and 2 for SPS. Amounts are presented net of accumulated depreciation.

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- Definition

Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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-SubTopic 10
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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- Definition

Tabular disclosure of public utility physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation expense and method used, including composite depreciation, and accumulated depreciation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 980
-SubTopic 20
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481834/980-20-45-1

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Tabular disclosure of all information related to inventories for utilities.

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