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Selected Balance Sheet Data | 9 Months Ended
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Sep. 30, 2022
Balance Sheet Related Disclosures [Abstract] |
Selected Balance Sheet Data |
(Millions of Dollars) |  | Sept. 30, 2022 |  | Dec. 31, 2021
Accounts receivable, net |  |  |  |
Accounts receivable |  | $ | 1,308 |  |  | $ | 1,124 |
Less allowance for bad debts |  | (112) |  |  | (106) |
Accounts receivable, net |  | $ | 1,196 |  |  | $ | 1,018 |
(Millions of Dollars) |  | Sept. 30, 2022 |  | Dec. 31, 2021
Inventories |  |  |  |
Materials and supplies |  | $ | 321 |  |  | $ | 289 |
Fuel |  | 234 |  |  | 182 |
Natural gas |  | 315 |  |  | 160 |
Total inventories |  | $ | 870 |  |  | $ | 631 |
(Millions of Dollars) |  | Sept. 30, 2022 |  | Dec. 31, 2021
Property, plant and equipment, net |  |  |  |
Electric plant |  | $ | 48,959 |  |  | $ | 48,680 |
Natural gas plant |  | 8,199 |  |  | 7,758 |
Common and other property |  | 2,824 |  |  | 2,602 |
Plant to be retired (a) |  | 2,258 |  |  | 1,200 |
Construction work in progress |  | 2,445 |  |  | 1,969 |
Total property, plant and equipment |  | 64,685 |  |  | 62,209 |
Less accumulated depreciation |  | (17,639) |  |  | (17,060) |
Nuclear fuel |  | 3,105 |  |  | 3,081 |
Less accumulated amortization |  | (2,864) |  |  | (2,773) |
Property, plant and equipment, net |  | $ | 47,287 |  |  | $ | 45,457 |
(a)Amounts as of Dec. 31, 2021 include Sherco Units 1, 2 and 3 and A.S. King for NSP-Minnesota; Comanche Unit 1 and 2 and Craig Units 1 and 2 for PSCo; and Tolk and coal generation assets at Harrington pending facility gas conversion for SPS. Following the June 2022 approval of PSCo’s revised resource plan settlement, amounts as of Sept. 30, 2022 include the addition of Comanche Unit 3, Hayden Units 1 and 2 and coal generation assets at Pawnee pending facility gas conversion. Amounts are presented net of accumulated depreciation.

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- 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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI https://asc.fasb.org/topic&trid=2122208 + Details
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