XML 21 R10.htm IDEA: XBRL DOCUMENT
v3.25.1

Selected Balance Sheet Data | 3 Months Ended
--- | ---
Mar. 31, 2025
Balance Sheet Related Disclosures [Abstract] |
Selected Balance Sheet Data |
(Millions of Dollars) |  | March 31, 2025 |  | Dec. 31, 2024
Accounts receivable, net |  |  |  |
Accounts receivable |  | $ | 1,394 |  |  | $ | 1,360 |
Less allowance for bad debts |  | (107) |  |  | (111) |
Accounts receivable, net |  | $ | 1,287 |  |  | $ | 1,249 |
(Millions of Dollars) |  | March 31, 2025 |  | Dec. 31, 2024
Inventories |  |  |  |
Materials and supplies |  | $ | 426 |  |  | $ | 406 |
Fuel |  | 149 |  |  | 164 |
Natural gas |  | 50 |  |  | 96 |
Total inventories |  | $ | 625 |  |  | $ | 666 |
(Millions of Dollars) |  | March 31, 2025 |  | Dec. 31, 2024
Property, plant and equipment, net |  |  |  |
Electric plant |  | $ | 57,386 |  |  | $ | 56,791 |
Natural gas plant |  | 9,951 |  |  | 9,834 |
Common and other property |  | 3,559 |  |  | 3,515 |
Plant to be retired (a) |  | 1,730 |  |  | 1,793 |
Construction work in progress |  | 5,956 |  |  | 4,720 |
Total property, plant and equipment |  | 78,582 |  |  | 76,653 |
Less accumulated depreciation |  | (20,249) |  |  | (19,852) |
Nuclear fuel |  | 3,598 |  |  | 3,491 |
Less accumulated amortization |  | (3,124) |  |  | (3,094) |
Property, plant and equipment, net |  | $ | 58,807 |  |  | $ | 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.

X
- References No definition available. + Details
Name: | us-gaap_BalanceSheetRelatedDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/210/tableOfContent + Details
Name: | us-gaap_SupplementalBalanceSheetDisclosuresTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration