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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2023
Accounting Policies [Abstract] |
Schedule of Property, Plant and Equipment | Pinnacle West’s property, plant and equipment included in the December 31, 2023, and 2022 Consolidated Balance Sheets is composed of the following (dollars in thousands):
Property, Plant and Equipment: | 2023 |  | 2022
Generation | $ | 10,446,291 |  |  | $ | 9,563,145 |
Transmission | 3,773,253 |  |  | 3,589,456 |
Distribution | 8,448,293 |  |  | 7,951,867 |
General plant | 1,543,330 |  |  | 1,347,678 |
Plant in service and held for future use | 24,211,167 |  |  | 22,452,146 |
Accumulated depreciation and amortization | (8,408,040) |  |  | (7,929,878) |
Net | 15,803,127 |  |  | 14,522,268 |
Construction work in progress | 1,724,004 |  |  | 1,882,791 |
Palo Verde sale leaseback, net of accumulated depreciation | 86,426 |  |  | 90,296 |
Intangible assets, net of accumulated amortization | 267,110 |  |  | 258,880 |
Nuclear fuel, net of accumulated amortization | 99,490 |  |  | 100,119 |
Total property, plant and equipment | $ | 17,980,157 |  |  | $ | 16,854,354 |
Schedule of Supplemental Cash Flow Information | The following table summarizes supplemental Pinnacle West cash flow information for each of the last three years (dollars in thousands):
| Year ended December 31,
| 2023 |  | 2022 |  | 2021
Cash paid during the period for: |  |  |  |  |
Income taxes, net of refunds | $ | 8,788 |  |  | $ | 46,227 |  |  | $ | 229 |
Interest, net of amounts capitalized | 310,996 |  |  | 245,271 |  |  | 227,584 |
Significant non-cash investing and financing activities: |  |  |  |  |
Accrued capital expenditures | $ | 206,269 |  |  | $ | 114,999 |  |  | $ | 167,733 |
Dividends declared but not paid | 99,813 |  |  | 97,895 |  |  | 95,988 |
BCE Sale non-cash consideration (Note 20) | 28,262 |  |  | — |  |  | — |
The following table summarizes supplemental APS cash flow information for each of the last three years (dollars in thousands):
| Year ended December 31,
| 2023 |  | 2022 |  | 2021
Cash paid during the period for: |  |  |  |  |
Income taxes, net of refunds | $ | 21,734 |  |  | $ | 95,985 |  |  | $ | 19,783 |
Interest, net of amounts capitalized | 267,261 |  |  | 227,159 |  |  | 217,749 |
Significant non-cash investing and financing activities: |  |  |  |  |
Accrued capital expenditures | $ | 206,269 |  |  | $ | 116,533 |  |  | $ | 167,657 |
Dividends declared but not paid | 99,800 |  |  | 97,900 |  |  | 96,000 |

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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 + Details
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