XML 54 R41.htm IDEA: XBRL DOCUMENT
v3.25.3

Debt and Liquidity Matters (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
Debt Disclosure [Abstract] |
Schedule of Estimated Fair Value of Long-Term Debt, Including Current Maturities | The following table presents the estimated fair value of our long-term debt, including current maturities (dollars in thousands):
| As of September 30, 2025 |  | As of December 31, 2024
| Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
Pinnacle West | $ | 1,664,583 |  |  | $ | 1,733,630 |  |  | $ | 1,367,770 |  |  | $ | 1,393,744 |
APS | 8,139,676 |  |  | 7,468,657 |  |  | 7,490,878 |  |  | 6,525,248 |
Total | $ | 9,804,259 |  |  | $ | 9,202,287 |  |  | $ | 8,858,648 |  |  | $ | 7,918,992 |

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

X
- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-13 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-12 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-12 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 + Details
Name: | us-gaap_FairValueByBalanceSheetGroupingTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration