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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Accounting Policies [Abstract] |
Schedule of property, plant and equipment | Pinnacle West’s property, plant and equipment included in the December 31, 2021, and 2020 Consolidated Balance Sheets is composed of the following (dollars in thousands):
Property, Plant and Equipment: | 2021 |  | 2020
Generation | $ | 9,480,572 |  |  | $ | 9,199,012 |
Transmission | 3,402,016 |  |  | 3,290,477 |
Distribution | 7,520,016 |  |  | 7,107,007 |
General plant | 1,286,057 |  |  | 1,241,389 |
Plant in service and held for future use | 21,688,661 |  |  | 20,837,885 |
Accumulated depreciation and amortization | (7,504,603) |  |  | (7,110,310) |
Net | 14,184,058 |  |  | 13,727,575 |
Construction work in progress | 1,329,478 |  |  | 937,384 |
Palo Verde sale leaseback, net of accumulated depreciation | 94,166 |  |  | 98,036 |
Intangible assets, net of accumulated amortization | 273,693 |  |  | 282,570 |
Nuclear fuel, net of accumulated amortization | 106,039 |  |  | 113,645 |
Total property, plant and equipment | $ | 15,987,434 |  |  | $ | 15,159,210 |
Summary 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,
| 2021 |  | 2020 |  | 2019
Cash paid (received) during the period for: |  |  |  |  |
Income taxes, net of refunds | $ | 229 |  |  | $ | (3,019) |  |  | $ | 12,535 |
Interest, net of amounts capitalized | 227,584 |  |  | 216,951 |  |  | 218,664 |
Significant non-cash investing and financing activities: |  |  |  |  |
Accrued capital expenditures | $ | 167,733 |  |  | $ | 113,502 |  |  | $ | 141,297 |
Dividends declared but not paid | 95,988 |  |  | 93,531 |  |  | 87,982 |
The following table summarizes supplemental APS cash flow information for each of the last three years (dollars in thousands):
| Year ended December 31,
| 2021 |  | 2020 |  | 2019
Cash paid (received) during the period for: |  |  |  |  |
Income taxes, net of refunds | $ | 19,783 |  |  | $ | 41,176 |  |  | $ | (15,042) |
Interest, net of amounts capitalized | 217,749 |  |  | 206,328 |  |  | 204,261 |
Significant non-cash investing and financing activities: |  |  |  |  |
Accrued capital expenditures | $ | 167,657 |  |  | $ | 113,502 |  |  | $ | 141,297 |
Dividends declared but not paid | 96,000 |  |  | 93,500 |  |  | 88,000 |

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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, 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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