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Selected Balance Sheet Data (Tables) | 9 Months Ended
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Sep. 30, 2020
Balance Sheet Related Disclosures [Abstract] |
Accounts receivable, net |
(Millions of Dollars) |  | Sept. 30, 2020 |  | Dec. 31, 2019
Accounts receivable, net |  |  |  |
Accounts receivable |  | $ | 965 |  |  | $ | 892 |
Less allowance for bad debts |  | (66) |  |  | (55) |
Accounts receivable, net |  | $ | 899 |  |  | $ | 837 |
Inventories |
(Millions of Dollars) |  | Sept. 30, 2020 |  | Dec. 31, 2019
Inventories |  |  |  |
Materials and supplies |  | $ | 275 |  |  | $ | 270 |
Fuel |  | 157 |  |  | 191 |
Natural gas |  | 80 |  |  | 83 |
Total inventories |  | $ | 512 |  |  | $ | 544 |
Property, plant and equipment, net |
(Millions of Dollars) |  | Sept. 30, 2020 |  | Dec. 31, 2019
Property, plant and equipment, net |  |  |  |
Electric plant |  | $ | 46,531 |  |  | $ | 44,355 |
Natural gas plant |  | 6,899 |  |  | 6,560 |
Common and other property |  | 2,401 |  |  | 2,341 |
Plant to be retired (a) |  | 287 |  |  | 259 |
Construction work in progress |  | 3,265 |  |  | 2,329 |
Total property, plant and equipment |  | 59,383 |  |  | 55,844 |
Less accumulated depreciation |  | (17,456) |  |  | (16,735) |
Nuclear fuel |  | 2,930 |  |  | 2,909 |
Less accumulated amortization |  | (2,630) |  |  | (2,535) |
Property, plant and equipment, net |  | $ | 42,227 |  |  | $ | 39,483 |
(a)The CPUC has approved early retirement of PSCo’s Comanche Units 1 and 2 in approximately 2022 and 2025, respectively, and PSCo’s Craig 1 in approximately 2025. 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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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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, deprecation expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84167750&loc=d3e42232-110370 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of all information related to inventories for utilities. + References No definition available. + Details
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